We went to Noah's Ark, an animal rescue sanctuary today. They had a large gun buster on the gate leading to the animal enclosures, and a few more around the animal exhibits. My son went there 2 years ago, and he says he doesn't remember these signs. The signs were a different color than their other signs, and the screws looked newer, so they may be a recent addition. This is a private sanctuary that doesn't charge admission but asks for donations.