Have any colleges or high schools been able to moderate dangerous levels of alcohol/drug use?

I know Denison has cracked down on it’s fraternities and sororities and I believe none are residential now. I also sense that they type of student who attends Denison has changed. I believe they have become more selective and do a better job of offering financial aid to good students. Denison used to (30 years ago when I lived in the area) have the reputation locally of being where rich Yuppie kids went when they couldn’t get into a better school. I believe they have a much better reputation now and get spoken in the same sentence with Oberlin and Kenyon. They still have had a couple of deaths related to alcohol in the last couple of years.