These are honestly the worst things about PvP lately that don't involve class balance or any type of seemingly annoying codework. I'm sure very easy workarounds could be found to resolve all of these issues, and it would honestly make the game a lot more fun.
I may add to this as I think of new things - I hope it is utilized at least a little bit.
1: Ban Edit by Anzu: No names., the Guardian who signs up for minis for hours EVERY SINGLE DAY just to troll - he stands around and talks crap to his group, saying things like "We must lose." He doesn't even try to hide the fact that he's just doing it to ruin people's fun. I know he has been petitioned a ton of times, but nothing is ever done, it seems like. I have petitioned him plenty of times myself, so please don't just give me an infraction and say "Make a petition." I'm honestly posting this here out of desperation because it's gotten so annoying and out of hand that it makes me just log off when I see him in minigames some days, because I know he'll be there ruining all of them for hours and hours.
2: Fix Chosen of Gullah. Guildmates currently cannot get credit for killing each other, and it encourages horrible gameplay between groups of people.
3: Move Chosen of Gullah locations AWAY FROM WATER. This also encourages the worst, least-fun kind of gameplay. In fact, all event locations should really be moved away from water, or cause water to do damage over time or something.