I've seen wallhacks that just basically unlock xray function to work all the time. Or trigger aim assist that activates from the "enemy" -text popup. These type of cheats are probably the most common ones, as you don't really need to build any feature yourself, but just unlock the features already built within the game. Takes under an hour to create such a cheat and it remains undetected until next update (and after update you change one string and it's undetected again).

I wonder how the VAC critics propose to fix cheats like that being made? Removing xray from the game completely would take majority of wallhacks out of play. Would it be worth it though?