The only thing that scares me about what we saw in Tuscon...

[wlduck]

But he did not flex at an opposing player. To me that is where the line is drawn. If you do something at someone, that is taunting. The muscle flexing is borderline, but he did it into empty space behind the play. I think it is not realistic to tell kids to get emotionally jacked up to play a physical and violent game, and then placing very narrow constraints on how exactly they can show those traits that seconds before were being encouraged.