These are a wide variety of things, from hacking e-mails, websites, taking over facebook threads, to ddos attacks and swatting.
We hear about it happening (especially the swatting and ddos attacks) when it ends up in bloodshed, violence, or affects thousands of people at a time but, we don't hear about it happening as much anymore.
The cynic in me is thinking that's because it's not 'news' anymore, it's not 'worthy' of being written/spoken about unless it ends in violence or happens to a sufficiently popular person (read: Celebrity) that people actually care about.
I don't think these attacks come from a desire to 'win' I think it comes from something more primal, anger, shame, and lack of ability.
People want to win, they don't /like/ to lose, it's hardwired into us to try our best but we only validate the winners. It's rare the individual who can step back and actually /enjoy/ a game they just /lost/. It does happen, sure, like if I am playing Warhammer 40K, or BattleTech, or even D&D I can enjoy even when I lose. If I am playing with friends, I can even enjoy losing on a game like Overwatch.
However internet culture is amazingly toxic due to anonymity and audience, and that makes winning even /more/ important, and turns up emotional responses to twelve.
But... does that really apply to MU*'s? Our anger and such tends to take a lot longer to build up to the point of ostracism. We are a lot more tolerant than most online gamers (see league of legends and dota for extreme examples) probably due to the media in which we use, text is slow, it's patient, it gives us time to think and respond.
Curious as to people's thoughts.