Like I have learned that it might not be a good idea to tell a kid at a school signing that you will autograph her forehead if she takes off her clothes and climbs up on a table. Because that's what a self-pubbed author did, and for some reasons parents who heard about his comment were not enthusiastic.
Now he's being banned from schools.
Part of the author's defense seems to be that he has visited over 3,000 schools to promote literature. I'll bet he got paid for most of those visits, so it's not quite as generous as it seems.