Steam games using VAC do not fully ban cheaters. They can still play on non-VAC ...

Steam games using VAC do not fully ban cheaters. They can still play on non-VAC servers. Of course, those tend to be scarce because no one wants to uncheck that feature when creating a server.

Xbox Live: https://arstechnica.com/gaming/2013/07/microsoft-explains-xb... I've never owned an Xbox so I don't know how effective it was.