Yes... for many reasons. It teaches kids a lot about how to act under different situations and being able to improv is a good skill. Plus the kids are probably acting inappropriate outside of school anyways and it is better to have it supervised by a teacher who can put an end to it when the time comes. Furthermore students learn to be inappropriate no matter what they do in school and should not be treated as babies. They resent it and rebel. If they are given the respect they deserve and are trusted to act mature while doing something like improv they have a tendency to respect everybody better and learn better while being good people in general. They should be trusted for more things, but improv is supposed to be fun and educational so I do not believe in anyway this should be removed because of any inappropriate actions by students who are after all just being teenagers!