That part of the game is something i really has hated since i started playing. Seems just silly that a random spectator should go in and play so aggressive. And that players with 15 in defense would have to foul to stop him.
I think it's a side effect of them making agreeability (or what we call aggressiveness) like other skills. They've said that the lucky fans have everything set to the lowest level, so if the skill was aggressiveness rather than agreeability they'd be docile. And it's exactly the sort of thing that easily happens in programming.