Replying to College classroom ediquette

Over the past four years I have wondered why students are so well behaved in the college classroom compared to high school.
You almost never hear of any incidents occurring in the classroom. Besides cheating and texting there's almost no harm done.

The two variables I see contributing towards this are you are paying for college and generally the kids who raised hell in high school did not continue their education.

Anyone have stories of college classroom incidents ?