Flash mobs seem to be a coming trend with the spread of the "social media". Once flash mobs only organized people to do funny stunts, like sing, act like zombies and then leave. Now it is being used to organized violent mobs to steal and harm people for "fun". The Philadelphia PD seems concern it will lead to violence - like no violence is presently involved. But what the PD really fears is the victims will strike back and harm the "children". I suspect fact Pa just passed a Castle Doctrine law played a part in this obviously political response from the Philly PD. See link http://www.myfoxphilly.com/dpp/news/local_news/cops-fear-violence-against-flash-mobs-062811 Generally interested in your reaction to flash mobs as a self defense expert. First, do you think the frequency of violent flash mobs will increase? Since many of the flash mobs are occurring in upscale location, the advise of avoiding going to stupid places with stupid people does not apply too much. But doing your shopping on the internet and ordering take out might be good advise. But the honest citizen confronted with a violent mob may have to act quickly to defend himself. Yet he can not just shoot into a crowd. I don't see a defense working that is based upon the fact the MOB threatened me. For a defense to work I assume a person has to be threatened by identifiable person or persons and direct his fire in that direction. And not miss his target or targets. The manner in which a mob acts is going to make it difficult to justify action against a specific individual(s) via proof that that specific person(s) represented a threat of grave bodily injury or death. So in the case of defense against violence from a flash mob how would you recommend a person conduct themselves in order to justify a shooting response, if required? We can save the question of recommended guns and ammo for another thread.