Did Valve really do that for Overwatch? It is on their store, so maybe, but I’d expect Blizzard to implement that sort of thing.

I agree that killcam tagging is not great for, like, actual “you are breaking the rules” type enforcement (because, yeah, players will generate a ton of false-positives). But if players had a list of traits and match-making tried to minimize some distance in the trait space (admitting it could’ve be perfect), it might result in more fun matches.