Guys, guys, guys. This has quickly veered completely into the ridiculous. Long hair has nothing to do with discipline, unless there is a rule about hair length. Players who have short hair don't have more discipline than those with longer hair, they simply don't like it long. Of course, I don't know why it would surprise me that a bunch of Tech fans would completely confuse cause and effect.
Listen, I don't care what hair length someone has as long as they can play football. But if PJ wants to set standards for appearance, I'm fine with that as well. He may use it as a way to impose discipline and sacrifice or whatever else you want to tag onto it. It's his prerogative.
Also, to single out dreadlocks specifically is a racist statement no matter how much you want to claim it's not. Perhaps your intent was not to single out black players, but that's the danger of language and not thinking through how people take what you say/write. If you mean long hair, say long hair.