Seriously, when someone wants to be a nuisance, it's not hard. Mothawakka, the lovely person all know and don't love, likes to waste his time doing such a thing. User cloning is also becoming more popular (or at least there are more people becoming aware of it and trying it out cuz it's fun). It eventually brings the server down altogether as people get disconneted.
It's a ring. People hate people. People want to make other people hate those people. The best way to do it? Join a server, talk smack and flood games. Tada. And it won't stop.
Kaillera needs an NC-17 rating on it.