yeah I know the feeling: I spent hours writing anti-cheat checks or fiddling with the server/looking up dodgy players and then you get nubs coming along and doing this.
I don't blame the writers (like t2x) as at least they're making money from selling hacks. The 13 year old kids that think its funny to kill of a 32 player server just before the end of the round fuck me off bigtime.
After spending loads of time adminning wheen I finally do get on - half the time recently I've had to come out of game to start looking up dodgy players.
The sooner they get the damn patch out the better