Take a look at the top of ladder rankings right now. It’s full of hackers who use disconnect hack to get free wins. It’s fairly obvious that the users are hacking because they make it so obvious (100% win rate over 50+ games each lasting under a minute). Blizzard should simply ban these players.
They might not affect the majority of players who are unlikely to match with their high MMR, but S ranked players and especially pro players run into these hackers all the time and I see it ruining their ladder practice session when they stream. Losing points for no reason is one thing but the worst is when the disc screen pops up and you can’t drop them, so you have to force quit the game.