The problem with riots is that the good and the bad get mixed together. Up this way, when the Red Sox finally won a world series, police used rubber bullets to disperse an unruly crowd. One struck a college girl in the eye, killing her (please don't anyone say she should have known not to be there). Fenway Park is a crowded h*llhole on any game night. The innocents had nowhere to go but through the mayhem. Bullets don't think, and neither did the CC officers in my opinion.
Now if civil unrest broke out, and a "rape gang" was coming down my street kicking in doors, well....away we go, but if I even had that in my mind, I'd keep it to myself. Only my wife would know it existed. BTW, not too hard to figure out the mechanics of it.