I'd just hate to see "our" guys being misidentified by LE or other decent people that may be attacked by the scum and need to defend themselves.
Would pics from "near" the action come out well enough to be used?
Just wear your grubbiest clothes and don't shave or shower for a few days before the events and you will blend right in. Oh, if the police tell you to move it, then move it as fast as you can.