It's not made any better by describing it as "gamers taking the competition offline". Two problems; first, it's making it appear as some kind of a natural extension of playing a game / watching a game stream. Hey, it's just some competition, boys will be boys! Second, it's too symmetrical, basically spreading the blame between both the perp and the victim. Again if you can't see this, what would you say about describing this case as "some Twitter users taking their gender politics discussions offline"?