In my experience, I've encountered a number of scummy players from the UK. Generally this all came from the type of players who have excelled at the game far more than others. I suppose it's a trade-off, that when you're "good" at something you don't have to be a pleasant person to have a conversation with. Naturally, the same kind of behavior happens with players around the world. Usually the "best of the best" aren't always the nicest people. Having been among those ranks in Destiny, I can understand that side of the table and why you'd need to reject someone from a fireteam (for example). Although, I can understand the other side too in the miles of players bound to let you down over Destiny's course.