I thought it’d be interesting to share my own history with the PCU, to maybe show a bit of light on why atleast some people might disslike them, and why I think those people are wrong. I apologise in advance if some time things are off as its quite a couple of years ago and I’m a bit of a scatterbrain sometimes
As I’ve said before in alot of posts, I’ve been on AD for quite a while now, going back to very late Wrath & properly getting into RP in early Cataclysm. At the time, I was alot younger & played primarily just in a circle of friends who I knew from school.
At the time, I played primarily Alliance & ocassionally on Horde. I had as far as I know, zero interactions with the Rotgarde or the general community/groups that today is the PCU. But there were things circulating alot. I was told every now and then by diffrent people, friends & guilidies to dont RP much on Horde-side at all, or if I did to avoid the Rotgarde. Why? Because they were just not nice people, no further explainations given. On ocassion I was told they bullied people but no proof of it other than just word of mouth. Given at the time I was still a teenager(16-17) & of course also wanted to fit in with friends I didnt really ask for much more either. But of course, I was wrong.
Fast-forwarding a little over the years through MoP & later WoD etc, I started to frequent the forums more often, particularly on another warlock character particularly a worgen warlock. I still knew people who time to time would just tell me the Rotgarde Gang is bad, and while I didn’t do any particular bashing on them, having been told stuff by others over the years had of coursed reserved me a little, and I am fairly sure I myself tried to meme on some of their posts in the past against bad roleplay and things. Again, I believe I was wrong in this.
I had also during the time in MoP become a mother myself, matured & as I became more active on the forums, I also engaged in discussions with members of the Rotgarde, or associated with them, and to a bit of a surprise, even when disagreeing on some things they were always generally very polite to me.
Fast track again through the forum history when the PCU name started to hop up(Or possibly a bit before it), every PCU-related person I chatted with on the forums were always friendly, atleast to me personally, and I saw them being friendly to others unless they were complete 
themselves.
I had also actually bothered to read more about the threads Perroy or other people posted, and found myself agreeing with alot revolving about opinions on roleplay & do’s and don’ts etc and general server behaviour.
During the more rough and recent periods of my life, where I was heavily struggling with Postpartum depression & feeling miserable well after it passed, as well as my at the time last remaining parent falling sick and later passing (All of which I got through thanks to some wonderful friends 
) I also had a very unpleasant forum encounter.
Being the softie that I am normally+everything going on around me, I took it very to heart and felt quite bad about it, and still do to some extent. I won’t go into too much detail to spare the drama, but in a discussion & disagreement about the old CotHL & Emmanuel, several people from both that guild and one that seemed quite associated with them(& one prolific member from the associated guild) took the disagreement to instead try and fling muck at my way for playing a worgen warlock (With some edgy PvE gear, the plague-doctor looking set from Wotlk that I only used for & said character also only used for PvE).
Accusations of varying things such bad roleplay & ERP as well as direct personal attacks despite never having met the person & things I never did, all of which also continued in-game with said person openly mocking in whispers about they could, and would happily also try and fake screenshots to cause as much damage as possible.
At that point they also admitted that it primarily just because they found it funny. All of this can just very easily be shrugged aside as some douche, but it had a personal impact on me quite severly due to never had such an agressive experience before & also being in the worst time of my life at the time. All because I in the end used the wrong forum avatar. It was also this experience that actually stopped me from using Rowená(who has since then changed to varying characters, such as 120 Vixi, Nemmsy, etc) as my forum avatar and changed to Vixí.
Here is the thing though. Aside from my close-group of friends, generally the only people I saw in that thread who backed me up and actually bothered to call out this individual and a few others for spouting BS and doing false ad hominem, were primarily people associated with the PCU. And later on, much later when I talked about the experiences on the forum, the first person(Again, outside of my lovley friends) to openly and very directly say “Yeah that isnt okay, Im sorry it even happened to you” was actually Perroy.
Having then frequented the forums with Vixi only, I have again only had pleasant experiences with the PCU, even when there’s been things I’ve disagreed with a few rare times, there’s never been bad blood at all but understanding. I have also more and more come to realise I think quite alike with several of the members. Any interactions ingame has also always been pleasant alongside this.
I ended up later on joining a discord associated a bit with the PCU, or some of its members atleast, the Gnomish Discord. And it’s been very lovley people there and fun posts to read even if I’m not very active. I also ended up joining the Assemblage of Uld for a time on my other warlock, and I will recommend them if you are looking for a gnome guild. While I in the end had to leave due to a very limited gametime(roughly 3-4 hours) to play & needing to activly pick and choose between playing & RPing with my closest friends(And even then sometimes choose between us playing or RPing), or do anything else, it was also not a sore departure either which some guilds can be.
The guild members were super kind and fun during my time in there, and when I left and said goodbye too I very much felt welcome to return again should that happen.
I apologise that this ended up a little personal and a bit lengthy, but the gist of the matter is:
The PCU as a whole are people, and from my own opnion, generally very nice people who have always been kind and supportive of me with no real reason to.
And from personal experience back in the day, alot of negative comments against them are often either just herse-say, things youve heard from friends with no actual basis behind them, which often comes from someone else down the line who actually did something wrong/bad and didnt like paying the consequences.
There also is alot of hatred towards people just for associating with them, such as a certain forum goer who took it to an even higher/bad personal level than my earlier issue in this post, with the justification for it being that I had previously mentioned at the time that I had joined a PCU guild so I deserved everything coming my way.
Edit: Okay this became alot more wall than I anticipated, sorry!
Edit 2: Assemblage of Uld was invisible for some reason ._.
