I don't see why you would want 7 people raging at you for ruining their game. Talking about skilled 5s anyway.
Because a win is a win....and some people want to win at all costs...
Because some people are trolls....
Because some people are asshats....
Because some people will pretend like they don't speak english and will go "No ingles!"....
All those things occur on a regular basis in skilled games...hell, skilled players are willing to troll role-playing ICO games on normal speed...if they're willing to put up with that I'm pretty sure they can put up (if not be inspired by) a bunch of people bitching at them.....