Hey guys I just found a way to not to get banned using any hacks (even detected !) in call of duty
All you need to do is to open up your game and go to barracks, and then open up the hack you want to use. If the hack asks you to play a match online, then do it, and exit the game. After this don't play the game for 2 weeks (if you want to make sure, then don't play it for a month), and check your VAC-status. You'll see that it's clean!
Well, I don't know if this works for all, but anyways, it worked for me! Give it a try