We all know schools are so ineffectual when it comes to that and the students interviewed seem to have very well thought out and nuanced views on the issue.
I think the opinions of the students should hold more weight over that of the teachers and parents here. If they are alright with uniforms but want more relaxed hairstyle rules, that should be the way to go.
On the subject of parenting classes though, YES GOD PLEASE SOMEBODY DO IT.