I wouldn't allow my daughter to ride a round a park and be obnoxious. But I think you are missing the point here. The toy was not a BB gun, at least not what most people would consider a BB gun. A real BB gun can kill small animals like rabbits and ground hogs (which I do in my yard, since I do not want to discharge a rifle). If you snap your fingers next to your cheek you will get the idea of what it feels like to be hit a plastic pellet from one of these toy guns.
This is the wrong case for us to defend our Second Amendment rights.
The realistic looking bb gun in question has been illegal in New York for decades.
Plus he was incredibly unsafe. He took it to a crowded New York City park and fired it with lots of children present. He let his family shoot it, even his 3 year old son. He then gave it to his daughter who pointed it at 2 year old children as she rode around on her bike.
What can a plastic pellet do to a 2 year old’s eye?