A good place to start would be outside the DNC convention. Just wrap the place in razor wire, put guards on the doors and be done with it ;-)
It would look like the scene from Red Dawn! Harry Reid (Played by harry Dean Stanton) would be screaming to his boy (played by Patrick Swayze) “Avenge me son! Aveeeenge Me!!!!”
Most of them wouldn’t have the sense to ask anyone to avenge them- they would be burning up the phone lines to the ACLU and their attorneys. I agree that would be a great place to start.