Moderators of the Steam forums have been talking of valve making a move on the texture hacks, making custom skins bannable via CoD Mw series only, other games ill still allow, any changes in size or insides of files will result in "Punishments"

Also rank hacks are on the list, Any levels "NOT DETECTED" which they meant by, if on record you never actually went through every point of xp you should have gone through, a -50 level will be applied to you, only title and emblem you use will be limited to "Cant Earn It" and an emblem saying VAC.

Just a friendly warning, this was being talked about in a "not so private" chat room, just a heads up everyone, be careful.

Credit goes to Bonehead325.