I agree about the brain part.
However, these teenagers have been known to look for a reason to commit group or mob violence.
I remember back when I was doing photojournalism in high school, our photo teacher was very adamant about dont go somewhere dangerous. At the very least don't go alone. For those of us who were more talented and adventurous he realized he couldn't keep us from doing such things, so he always reminded us that the camera is not worth our lives. If all else fails, a 3-5lb (or more) camera on the end of a 3' strap can be a pretty wicked weapon.