Some people are weird, and the internet makes it more likely for us to encounter them.
Was playing a quick bot game in LoL just for the first win bonus, and after we took the bottom tower, we both headed mid to help a Vlad take his tower. As soon as he approached he starting going mad about how mid was "his" and we needed to go away.
We took the tower and headed off up top as a result, and he just stayed mid and farmed. 3 of us took both top towers, and then headed mid as it was the team-fight phase. He started hurling abuse at us all again. We all agreed to humour him, said ok, and cleared the jungle and 2nd bottom tower.
He then gets rushed by all 5 bots in mid, cries for help, and we all ignore it. "Enjoy YOUR mid."
He dies, we kill them all, then roll through mid and win the match before he even respawns, haha.
Weirdly, this was a case of one idiot with no gamesmanship bringing 4 other strangers together for a laugh.