This reddit post
https://www.reddit.com/r/DotA2/comments/8816oh/12_of_all_matches_are_played_with_cheats_check/
says about a new cheat detector that tracks match history and within minutes it detects cheaters using mouse movement in replays etc. Looks really dangerous if valve employs this strategy.
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Comments
It's fucking Valve,they made no effort to fight cheaters since 2010.Which is 7 years,so don't worry and keep cheating.
Its very unreliable lol says all my games were "clear" which means no cheating lol. It only can detect "zoomout hack" and "creepblock"
ohh we are fucked if a fan boy can do it maybe valve will do it soon isnt it?.
Theoretically, they can compare spells\items uses with the mouse\keyboard and detect ensage, but it could be resolved by emulating mouse/keys so no sense to spent time for a feature that can be bypassed.