[nawgszy]

Just as DOTA2 does it according to a sibling comment of this, CSGO has a system called "Trust Factor".

Anecdotally: I am a nice guy and a good teammate, I don't abandon, I don't team-kill, etc.. I saw quite a few cheaters when I first started playing the game, but now they are quite a lot more rare and especially more subtle, to the point where I am usually not certain even when I suspect someone.

There's some pretty damning stats about how many people cheat in CSGO as well, so it's seemingly quite strong in my opinion. Of course, other's summaries will beg to differ as they see a lot of cheating and hold themselves in equally high esteem, so ymmv