Could be... Maybe I don't know enough about what acid does to you (never tried it or anything silimar), but as far as I'm aware it's not a drug that turns you violent or destructive in any real way. But yeah I guess it was enough to make the school staff/meds to get worried about others' safety.

As for public indecency, I know that the US has pretty harsh laws regarding public nudity, so perhaps it was their way of punishing him for that without actually evoking the specific charges given that OP was high af during that time.