High schools here in the Sacramento are very good about controlling the conduct of students at graduation night festivities, often hosting chaperoned, all-night parties at locations where nobody is allowed in or out after the party has begun.

I don't know about problems after proms, but only one of my four kids went to a high school prom - as an anti-prom statement, he wore a (nice) black shirt and took his girlfriend's two-year-old daughter as his "date" to the prom. They were the hit of the prom, and their prom photo was very cute.

I work with high school kids in the church youth group. Most go to prom. They go out to dinner, then to the dance, and then home. A good number of kids, like mine, don't want to deal with the social pressure and pretentiousness of it all.

-Joe-