I am well aware that being a civilian and seen in the open with a firearm is a recipe for disaster in such a situation (how would responders know I'm not involved?) but I would obviously want to protect myself and others should we have no other choice.
That is where communication is key. It would be optimum to have someone inform the dispatcher that a Man/woman dressed so and so is engaging the BG. We all know the dispatch and the police do not want you involved, it is a risk. It has been shown that once someone engages the BG in these shootings they then turn their attention away from killing innocents.
Becoming involved in one of these situations is truly a Pandora's box, I however, cannot allow for the slaughter of innocents if I can do something to stop it.
Another question; Does you carry gun even give you the option of responding?