why is men with long hair a crime?

In our area, I see men and boys with all sorts of hair styles from crew cuts to nearly waist length. Nobody scuffs at any of them. Our District Attorney had long hair until he was voted into office then he got it cut. I know many with long hair. If the school has a policy against long hair, that rule would have to be kept by all students. I just think that is a dumb rule. As long as the hair is clean, who cares what length it is. Just my humble opinion.

There are rules that we must obey and maybe at that school males with long hair is against the rule,if he cannot abide by such small rule then how effective he be in the working world,the barber is there and I'm sure it not limited when he leaves school he can do as he please with his hair. It is not a crime its just rules,i like to see males with long hair if it looks good.