I admit that I behaved similarly at times. But, I was bullied in school because of my weight. The teachers/principals wouldn't do anything because they 'never caught the bullies giving me trouble'. So, I would get mad, act out (usually violently) and get in trouble. Not the way to handle it, I know, but... when you have the same problem from kindergarten through 6th grade, you kinda stop worrying about the proper channels. I would get in trouble, the bullies wouldn't.
But, as for this, I agree with it. I never had the police called to deal with me, but this kid deserved it. If you look at the video games he was playing, and the tv he was watching, it would probably all make sense, and I guarantee you, his mother would disagree. The pepper spray SEEMS a bit much, but, if I had to deal with this same type of problem for a third time, I would probably justify the pepper spray as well.
I enjoy violent video games/tv myself from time to time; but as an adult, I believe that I can tell the difference between the tv/video games and real life.