Why do people suck?

This question appeared to me again this weekend, when all four tires of derek's car got slashed along with are neighbours. Can anyone explain the randomness and the stupidity of the people who do this kind of thing. Is it because he decided to get a car wash that day? Is it because he worked his ass of to make the money to afford to go to school? Is it that hes still paying off his car and they decided that some how he could afford this instead of eating for the next 6 months?I thinking none of these is the right answer and its just some jerk off trying to be a tough guy by slashing tires at night, like serious whats the point of that. If he wants to piss off random people and not even be a man or woman about it and runs away at 3 in the morning when none are the wiser. Thats the most pussiest thing I've ever heard or seen done its so stupid and makes no sense. So my question to the world is why do people suck?