Respectfully, no one has resisted a flashmob violently YET. I just put this here for intelligence value because I am trying to get people to be forearmed AND forewarned.
This is not exactly the same situation but it illustrates how quickly someone can produce a “choppah”. There is always one nearby and it’s only a shout or a quick nextel chirp to bring it.
http://www.myfoxphilly.com/dpp/news/local_news/video-shows-dramatic-septa-bus-shooting
The people advocating a violent response are idealizing the situation. An effective violent response would help deter future attacks, but only if done properly (a few armed and trained people with some wall behind them). One armed person with a mob around him will probably just end up dead.