I just played a game where I was matched up with a premade of 4's.
We were at the brink of destroying enemy nexus (the game was one-sided) and my team just surrendered the game.
When queuing as 4's, surrender should only count when there is a unanimous vote, not the usual 4 out of 5.
This is so stupid to be able to just surrender a game like that to troll.
EDIT: This can happen in any mode of game including ranked queue. The fact that this happened in my game is normal is not an essential part of the discussion.