http://forums.steampowered.com/forums/showthread.php?threadid=317167
Since there seems to be a HUGE influx of ´I was just on a server and saw a cheater´ or ´VAC doesnt work´ threads as of late, we are going to start closing all of these types of threads.
VAC uses a delay banning system. What this means is, a cheater gets flagged by VAC and then gets banned in the future. So it is very possible you can see someone cheating on a server. VALVe will not accept demo´s, Steam ID´s, etc of a cheater for banning, so please dont ask. If you do see a cheater please refer to this thread
You can be assured that the player has most likely (if not then soon to be) banned by VAC. The system just hasn´t instituted its latest ban list.
Thanks.
:bye ban: