Well they kinda have to, because left to players they come out with stuff like: (and these are copy/paste quotes) from their MW2 bans:the mods and other players post their usual dribble
"EVERYONE saying that they were wrongfully banned have WINDOWS 7 64 BIT. "
"I use a laptop as well, that makes at least 3 of us. Possible connection?"
"One of my friends said it could have been when i changed the volume on my laptop"
"maybe we got hacked by cheats/hacks on servers the game himself connected us to"
"i updated my video card driver yesterday could that be it?"
"VAC detected new security measures/programs as cheats in the new operating systems."
"Antivirus software"
"Valve might have even forced the console opening on us."
"How Many of you have Alien Swarm? And how many of you got it right before you got banned?"
Seriously...