We're still dealing with the increased militarization of our cops in America stemming from 9/11. Here, if you're an adult and are running around in a city like that and pretending to shoot another person, there's the distinct possibility that a. people are going to report suspicious behavior and b. cops are going to come and tase you, maybe beat you up a bit too (especially if you're not white, unfortunately).

The amount of criminals that were once children is high enough that it might be worth looking into.

Right, but hiding and jumping from behind a wall with a "black device" in your hand might get some cops nervous.

Clearly, sir, you do not live in America.