Valve just released a new update for Dota 2 which now includes a system similar to CSGO Overwatch where experienced players who are in good standing and can investigate reports of disruptive actions in matches.
Players will be shown a replay of pre-recorded parts of a match where they can observe a suspected player and their overall behavior after which they can give their verdict on whether the suspect is guilty or not or if the evidence simply isn’t enough. Depending on their accuracy, they will be presented with more reviews while players whose verdicts are inaccurate and false will be barred from taking part in Overwatch.
Overwatch bans usually range from 30 days and can even result in a permanent ban on repeated reports and suspected players risk losing their in-game inventory forever, the ban cannot be overturned or appealed against either.
Valve has stated that for now, the pool of players who are eligible for the Dota 2 Overwatch is fairly small, however, more players will be eligible over time.
The overwatch system has been somewhat successful in the past in CSGO.
The update is live and playable effective immediately.