Well, unless you happen to find yourself in the middle of a flash mob of illegal aliens protesting state immigration laws while wearing your US Flag or US Constitution golf shirt, BE is the most likely event, historically, to be caught up in when violence breaks out. If we can't bring ourselves to describe a known historical hazard when we see it, we may as well give up prepping for emergencies. This doesn't have anything particular to do with the racial makeup of the perpetrators of violence, but the historical actuality of the propensity for this event to turn violent.
This thread is about mob violence, or specifically a "flash mob." All the talk of flash mobs I've been made aware of, don't happen during dedicated events, but rather spontaneously... ie when the possibility of confrontation from an organized body of "good guys," would be remote. I think it goes without saying that if any of us were going to the Black Expo, or any event involving large groups of people, your awareness is heightened to a point that there is no "gotcha" moment. It goes without saying, that a flash mob, would initially take you by surprise... it is at that point that one has to start thinking about their safety. If people want to talk about Black Expo using poorly coded euphemisms, start another thread, and address that event there.