Teen hacking is it bad or harmless joke.

I think that this is not a  harmful joke because he could get suspended because he thinks he is the ruler of the school and i think that is bulling. And he is bulling the kids saying this is my school and you are not going to boss us around. I think he should erase it because he is going to get in trouble when he gets to school. I think he is going to get a fine or he is going to jail because he was hacking in the schools web site. So he better be careful.