A couple years ago a kid of about 11 was aiming what I assumed was a BB gun at me across the river. Nothing serious happened, a few steps later and I was behind hard cover, called the police who were talking to him a few minutes later. After reading the Airsoft incident from the other day, and walking by that same spot, I started thinking. If a child aims something gun-shaped at me, I'm going to assume toy, and act accordingly. If an adult does the same, I'm going to assume gun, and act accordingly. I think most people will do the same. The question is what's the age where it starts to shift from toy to real?