Sometimes I see admins banning players randomly
Like you know what's going on at all times?
Maybe an admin banned a cheater? Obviously he wouldn't be stupid enough to announce beforehand that he's spectating someone for doing it.
Maybe he banned someone mic spamming on another team when alltalk wasn't on?
Maybe someone broke a cade who was warned for that crap before?
Or maybe that person was supposed to be banned and somehow was back on the server?

Admins don't have to explain themselves to anyone except to the higher-ups. If you have proof of abuse then just post that crap already otherwise this thread was meaningless; no one will take you seriously if you don't.