OOC: While I agree 603's definition of hate speech was a bit too broad, I also think, you should include hatred against sex within the definition of hate speech. Discrimination and violence against women often stem from hatred. If schools could nip such hatred in the bud, it would not only protect cis women but trans ones as well.
If some weirdo told you they hated you because you're male, you could shrug it off but if that weirdo grew up to be a husband beater, his/her husband won't be able to shrug it off.