I thought is was genius. Send a message when the other team is the most psychologically vulnerable. It's kind of like throwing it deep after a turnover. Now, if punches were thrown or something like that then it would be bad for sure. The mental aspect of football is so critical, you can disrupt all but the most disciplined of players. If a player is angry or frustrated about something that happened earlier, they'll be more likely to miss their assignments, blocks, forget snap counts, etc. A peel-back block can do the same thing to a player's or team's morale.
