Still wondering what kinda special sauce that Blizzard is using in Overwatch. In my literal thousands of hours of playtime I encountered so few blatant cheaters its probably still in the double digit. Are there probably a good amount of cheaters I didn't realize were cheaters? probably, but does it really matter if you don't realize they are cheating?
PirateSoftware on twitch/youtube talks about his time at blizzard working on catching cheaters in WoW. Their methods are usually about figuring out how they're cheating and what behaviors cheaters follow.
Before overwatch they had years of experience catching cheaters in wow.