Well, I know that in my high school there was a teacher who was sleeping with a student when she was 15 -- under the age of consent, which is 17 here. Nothing was ever done about it. He finally was forced to resign 2 years later (during my last year of high school) midway through the year for making remarks to female students, who reported him for sexual harassment. And trust me, I heard these remarks and they were pretty damn vulgar, some of which I can't say here as they would break the PG-13 rule.
There's another teacher who was known as the "perverted leprechaun" because he would constantly hit on the female students and basically had a shorter-skirt-higher-grade policy. I had him my sophomore year of high school (so I was 15-16) and wore a low-cut shirt once; he spent the entire class period staring at me. I was minorly creeped out and refused to wear anything that was the least bit revealing the rest of the year.
It seems that when stuff like this happens at the high school level, no one really cares or does anything about it, but at any younger age people throw fits.