Have only done that once. Lost patience with lag and not being to kill a painfully inferior team. I don't get upset too often with enemies per se, regardless of what weapons they use (including FL, Thorn, whatever), but scoring low because of things out of your control just bloody grinds my gears (as it were). Edit: the lag today after my first Rumble game onwards did make the pillow next to me take quite a beating though.