MMOs mostly, Rappelz I spent the most time in. I noticed it a lot in Destiny raids too though.
I almost never partied up in competitive games. You only get to get a team wanting to stay together after you have a really good game, and thats only ever because the enemy team sucked. As soon as you come up against a team better than the one you built your fairweather friends turn nasty.
I assumed the quote in the article was a man talking about his woman would think he’s cheating.