Well at this point, and in my opinion, you did everything correctly. It sounds like there really wasn't much you could do to begin with. You recognized a problem and immediately prepared yourself in case the situation spilled over to you. I can't speak for everyone on here but I will not get involved in any situation like that unless I am sure that someone's life is in danger. For example, if I'm in a store while it's being robbed the safest thing I can do is let the guy have the money and leave. I would not act unless I was sure he was going to start shooting people. Property is replaceable, life is not.