Anecdotally, after mucking around in 2 lobbies that instantly crashed for 40 mins, I went to play Starcraft 2 ladder and got 2 disconnects that forced me to forfeit a few hours apart, which is very rare (2 in one day is unheard of). So yeah I would not play custom lobbies without unplugging your router for 10 mins afterward if you play other competitive games like Starcraft or Counter Strike because until your IP changes it's gonna get hit.
Really unfortunate stuff, although I can't say I'm surprised people this manchildtarded lurk among the playerbase.