Originally Posted by kane

In theory this is 100% correct. In practice, when the shit hits the fan most people panic and run. When it comes to fight or flight, most choose flight. When you are in a nightclub full of people and chaos erupts as a guy opens fire, it could be easy to get lost in the scramble. Even if there is a person or persons there that would be willing to attack the attacker, they may never be able to find them. If they were armed would that help? Possibly, but here is the bigger problem with that. How do we tell the difference between a responsible, trained and quality person who will use their gun only to defend themselves or others from an attack and a thug who will shoot someone for no real reason?

If I knew many people were armed at a nightclub, I would stay the hell away from there.