The thought process in the back of everyone's mind is pretty clear-you really don't know what the bad guys are going to do. After all, they're already crazy enough to enter the place with a shotgun and a pistol, with the "intent" of holding the place and the people up.
How are you to know whether its going to be just armed robbery or they want no witnesses? How much time do you have to figure it out, and what do you do? Do you even have a chance or do they already have the drop on you because of where you are and what you're paying attention to at the time?
Are you willing to take the chance,with your life, that they are going to be "rational" about it?
The ideal to me would have been every customer and employee drawing down on the perps and given them residence on boot hill. That way, the good guys don't have to worry about what the intention was or what might have taken place.
The hand wringers can spend eternity second guessing what the bad guys might have done or what their intentions might have been. Of course, this would be a very different thread if the BG's had murdered everyone in the place, and what a shame it was indeed that a good citizen, "properly armed and papered", did nothing because they didn't initially feel threatened by the presence of two armed hoodlums?
The act of what they did put everyone's lives in the hands of dishonorable folks-the danger not being the weapons themselves, but the intent and actions of the perpetrators.
Just what is the mindset of people who want to give the armed robbers the benefit of doubt while there is a store full of customers and employees who are supposed to accomodate their actions
. See ya'll later! 
