This sounds fun.it might be more than 10 but ill try to keep it within the quota.

1.people who does random trade
2.smurf who is eager to kill than support the team
3.rogue who cant kill and ask for 1v1
4.rogue who cant kill and ask for 1v1.and still lose and blame the lag,mhytic almost everything.
5.people who steal packs
6.tanks who who charge after rogue and smurfs
7.actors,conspirators,scammers,scammers wannabes
8.quimby for spamming public chats
9.negative influencers
10.senior forum adepts who eaen their titles for many crappy and negative posts and hijack others.less talk and more play.

Thats my list.cheers.