And I'd be the one holding you back.
You don't do that in the middle of a demonstration with all the cops watching and the news crews filming everything. Just bide your time and after the demonstration, follow that POS to his car and take care of business in private. Put him in traction. It will still make the news, but I won't have to come and bail you out.
During the next demonstration, everyone will be watching each other wondering who's going to follow them home and beat the crap out of them. A little fear can be a great force multiplier, bro.
--Boot Hill