that's typical behaviour for people that age, later on it will show itself in other signs of abnormal behaviour, it's just really sad but look on the bright side, they'll never get far in life, you will, respect for letting that kid out

but these are just the 'normal' pricks that are on every school, every guy I've known who used to do such things is either changed and regrets what he did or is even worse, in the latter I haven't spoken with them as you can imagine cause they just don't exist in my world, such people often got personal problems