1.  How does anyone know if another is sexually active, unless he or she tells them voluntarily?
2.  What is the state or the police going to do about this?  Report it to the feds so they can put a notation on the person's passport?
3.  In what way does this protect a student?
4.  They know what they're doing, even though they may not make the best decisions.  This should have been mitigated by education from the parents and the school beforehand.