Here is how you can kill horde players by griefing them.
I’m writing this, so it gets fixed asap, as a friend of mine got killed that way with lvl 40.
There are many ways to be unpleasant in the world. There are many unpleasant people in this world
Why mention another way? Why show yourself to be another?
Sad really.
Kinda self explanatory…
Then you get banned for griefing.
I understood nothing 
Enemy nps who hit you will pvp tag you even if you dont attack back.
Wich is a change to how it works on era realms. Even Thorns doesn’t tag you there. Only deliberately attacking the guards. On HC realms you get auto pvp enabled if they attack. Wich is stupid
I think this might actually be deliberate. With HC realms they changed that you cannot attack a pvp enabled player, without first manually enabling pvp. You cannot even buff a pvp enabled player if not flagged for pvp yourself ( I’ve tried that). Not getting flagged for pvp when a guard attacks you, would mean you can’t cc or defend yourself if you wish to, without first manually flagging yourself.
So this left Blizzard with 2 bad choices, either not change the mechanics and leave people without a means to fight right back or changing the mechanics and making people vulnerable to griefing.
Personally I think not changing it would have been better though to have left it as it was. You can always run away (which most people accidentally aggroing a guard tend to do).
So this happen to all guards no matter the zone/faction?
If yes, it’s not a bug but a change from blizzard, right?
And if you are flagged for pvp how many minutes have to wait to un-flagged? 5 minutes? Can’t you just log-out or hearthstone?
When I got flagged for pvp by a quest in Hinterlands, I logged out hoping the timer would tick while I was offline. But no, it doesn’t. It takes 5 minutes to get un-flagged.
Yes, you can HS. But you better be sure your HS is in a safe location.
If your HS is in Gadgetzan and you HS while flagged for pvp, the guards will kill you.
Unless you know its safe then HS out. Otherwise I would just log out for a period of time.
The third option would be to make guards generally passive to non pvp enabled players, and I don’t see anything that would be wrong with that.
I think that would take to much away from the atmosphere - enemy settlements should be the scary I better stay away from area. If you play like alliance and run though the barrens it feels just hostile … so many enemy camps you have to stay away from and not just ignore the guards and maybe have an friendly alliance party at the crossroads. At least the liftguard to thousend needles is yellow so it lets alliance use the lift save.
A naked Gnome party yelling at Sylvanas isn’t something I would like to see everyday in Undercity.
Doesn’t it only Rick down while logged in?
No, only some. At Lift in Thousand needles 1 guard of 3 only flags you.
Yes 5 mins. But you cannot log out if attacked, and some stand ready to grief. FP will make you drop Flag.
I dont get the point. Why not simply leave a player unflagged until HE attacks a guard or other player ?
You cannot attack other player without both typing in /pvp.
But you could have use your solution to Guards.
Thruth be told I don’t entirely get why they had to change the mechanics in the first place. It is a PVE server so anyone flagging themselves for PVP should be aware they can be attacked without warning.
Are there potions that can make you invisible?
Although i guess the possibilities to survive from something like this are nearly to zero. There will be many enemies waiting to kill you on those locations, just for fun.