There are two schools of thought regarding firearms-oriented warning signs. First, they work. If burglars see a sign like this one, they’ll chose an easier target. Second, they don’t work. A ballistically threatening sign signals a home invader that there are valuable guns on the property. If the bad guys have their eyes on the prize, they’ll either wait until the armed homeowner leaves or . . . they won’t. If they don’t, they’re likely to come in guns-a-blazing. How great is that? Still, this one’s clever, no?