[hga]

As noted elsewhere, these events are so rare and aberrant that it is difficult to impossible to come to firm conclusions.

BUT, we do know these suggestive things:

Of the recent, going back quite a ways shootings (I think back to 1989, but maybe post-1966), only the Arizona Congresswoman's was not in a "Gun Free"---except for the active shooter---location. (And if the people right there hadn't stopped the shooter while he was doing a magazine change an armed citizen who showed up while they were still wrestling with him would very likely have.)

The Aurora, CO movie theater shooter went significantly out of his way to go to a theater that was so hoplophobic that they required the off-duty police hired as guards to go unarmed (!). All the other local options had no such policies.