Speech Codes

I am interested in speech codes in the fact that they are effective in upholding the safety and keeping a good learning environment. It seems reasonable to me for universities to inhibit the rights of students in the best interest of the greater good. Hate speech intended to physically or emotionally harm someone should be unprotected speech and in my opinion should be restricted. However, if an issue seems offensive it should not be restricted. Offensive and hate speech are two very different forms of speech. Offensive speech can be meaningful like the burning of the American flag or the superiority of the white race. However, dressing up as blacks with nooses around your neck running around scaring people is not a meaningful speech and should not be protected.