I have eaten at that IHOP. Even before seeing the google Earth photo I figured the armed man at the BBQ probably made the right choice. He may lose sleep imagining what he might have been able to do, but his family is no doubt glad he didn't play hero. The people inside, with the exception of the Guardsmen and any felons, had the option to carry and defend themselves, and did not choose to do so. It was not the BBQ guy's job, and he might have been thought to be an accomplice if a LEO happened to be in the restaurant or passing by.