It’s because 90% of the Rpers play their characters as just a face with no cultural, historical or other ties to the setting. A second life extension of themselves. Therefore they see no problem about attending the event with their character, because they wouldn’t be barred from a public event in IRL either due to a thing like race or other reason, no?
Hot take but true all the same.
There´s an unfortunate trend I´ve seen among some RPers, which I would for the lack of better words call toxic inclusivity. In the same way toxic positivity views negativity as objectively bad thing that is forbidden and puts positivity on a “morally right” pedestal, toxic inclusivity views any rules/requirements/standards as morally wrong thing because they, by nature, create roadblocks that some will not pass.
So, from a viewpoint of someone who thinks that way, Acrona making events in new unofficial night elf capital that are aimed at night elves and do not allow for Horde presence, is a horrible gatekeeping because the act of not allowing everyone to take part in something is automatically a morally wrong thing.
Because they crave content and don´t care whether it makes sense for their character to be there, they just want to OOCly be there, period.
Also, some people just seem to be incapable of RPing more than one character and they will try to do everything on that character.
It’s pretty embarrassing if people don’t have the capacity to think, “Ah, well, this character isn’t applicable to what’s going on here. I could go on another that it actually fits and is more relevant.”
I am one of those people that Syelia mentioned who is bad at playing more than one character. I can do two, three is a real stretch and my interest will quickly fizzle.
I just… simply don’t go if the event doesn’t really gel with the two that i juggle at a time.
I guess this is another one of those “RPing with other people is a complex thing that sucks at times and there’s little we can do about it”.
I just wish people understood the absolute quality and immersion that comes from being present at an event actually catered for your character. It’s so much fun. It feels like a shame to treat it as just some spot to hang out at.
I’m in this boat aswell. Des here’s my rp main, then there’s my DK and recently my worgen, and that’s already stretching my capabilities by alot. So, as others mentioned, if it doesn’t make sense for my toon to be there, he won’t be there.
Yesno. The NPCs in question are, to my knowledge, no more than 2 cenarion circle tauren. And they make it very clear that they have to watch their every move and word.
Funnily enough, that worgen, Hargorin, was my very first RP toon on Argent Dawn when I came here in 2013, but IC he’s the younger brother of Des. But around Legion somewhere I felt I needed some change, and so he took a break and has lived with the Gilnean settlers in Bradensbrook until recently.
Acrona is respected to much on this server, and especially amongst the NElf community, for people to try and dare interrupt her events. 
(Basicly what Swordmaster said follows now)
I mean, lets be honest. There are 2(?) and both are from the Runetotem Clan as far as I know. And Hamuul has been a exceptionally notable ally of the Night Elves since Vanilla. And even then he cautious Horde adventures on how they behave within the City limits, lest Tyrande revokes their permission into the village itself.
I love these RPers, randomly appearing all over Azeroth without a problem for any event going on, just to hop on the next portal back home to Stormwind, lmao.
Sometimes my Characters cannot make a event IC because of the distances involved and they just randomly hop everywhere 
See actually I don’t have an issue with that.
Don’t let distances get in the way of good RP. That’s what I have always thought.
But do weigh whether your character should be there.
Oh, it was in no way meant as a critique to those who have a reason to be at a certain event at a certain time! Especially if it makes sense. Just musing how my characters sometimes miss events due to distances and they appear at events that do not make sense for their characters at all!
As you said:
Sorry if I came across different then what I intended 
You give me too much credit, I think it’s just that
a) I try not to get on people’s nerves too much so they don’t try get on mine, minding one’s own business most of the time 
b) Powerful granny vibes, having been here since the dawn of time 
Related to disruptions, there were some Horde side characters in almost all of the Amirdrassil events. I don’t think anyone tried to disrupt the events on purpose though. Sometimes it was honest ignorance, misunderstandings, characters getting invited to tag along friends on a pure IC basis etc. In cases like that I rather let it slide than drag people through the mud if the disruptions were minor.
It’s always good to check the full event info in advance though if you’re interested in an event, and before asking friends from the opposite faction to come along. Could also reach out to the organizer in advance if one absolutely wanted to attend to see if there’s any leeway.
Heh, they might also not know (or care) that I’ve done a bunch of events on Horde side too plus many crossfaction events, it’s just that there’s a time and place for everything. People are often too eager to make polarizing claims, and blanket blame groups or communities for not meeting their personal wants.
Hey… if Horde can roam in Bal’ameth unpestered these days cause they helped out the Nelfs…
Now in all seriousness; I think that we should treat cases like Bal’ameth in-game when they do happen in-game or when we have evidence to point otherwise and not assume just because the Nelfs did it (as much as they used to be hostile to the Horde) it happens everywhere… use good judgment Horde players (all 3 of us that are still roleplaying) would probably also hate that Alliance are suddenly chilling in Tirisfal because the Pallid Lady said its okay (headcanon).
And this post is why you don’t want to mess with the event organizers. Especially if they’re friendly and approachable, but commit to their events like a… uh, devilsaur commits to chasing their prey.
Don’t poke the devilsaur!
I still have PTSD from actual vanilla Un’goro Crater… and all of a sudden it was there… the White Death… a giant white Devilsaur elite that got right behind you and killed you on the spot.
Highest ranked tauren druid in the Circle. Was allowed to visit Darnassus.
Man’s a legend!
But watched or no, the Horde are still technically welcome.
I do thoroughly agree that if something is catering to a specific band of A/H/N, we should try to keep it to its theme.
I suppose the key takeaway here is that “allowed” isn’t the same as “inviting everyone over with open arms”. Quoting Hamuul’s in-game dialogue:
On a Horde character:
"Amirdrassil has bloomed. Bel’ameth marks a place of healing and respite for the kaldorei.
Part of this was due to our aid. Tyrande has graciously allowed us to walk freely here because of it.
Enjoy what this new land has to offer. Bask in its beauty, but do not make the High Priestess regret her decision, < player >."
On an Alliance character:
"Amirdrassil has bloomed. Bel’ameth marks a place of healing and respite for the kaldorei.
Tyrande has graciously allowed my people to walk freely here because of our aid.
Rest assured, we are merely here to bask in its beauty. The Priestess will not regret her decision."
People can read into these slightly differently, such as who they assume “us” and “my people” exactly to refer to. The Champion & the tauren? The Horde at large? Etc.
There is a pretty big difference in “if you wish to visit and join the celeration of our new home, you are welcome to do so” vs “You can live here permamently. We are kin.”
Not even Dalaran, the neutral city, allows everyone to live there. The novels go into detail concerning the city’s history of discrimination against non-mages. They’re not allowed permanent residency, and they’re subtly encouraged to leave once their business is done.
They’re still allowed to enter the city to engage in business, but the people of Dalaran like it when you don’t linger afterwards.
Tourist town without residence for the tourists. Please come and look at our shops, but don’t stay longer. No, we do not have any rooms available.