Yeah, this. While it's fun to laugh at the crazy principal, is there actually any law against impersonating a person online in social media? Identity theft is the closest thing I can think of. But without seeing the accounts in question, it's hard to say if it was believable that it was actually his account or not (that is, if it was obviously a parody account or not). There's a difference between "making fun of somebody on social media" and "pretending to be somebody on social media in an attempt to ruin their reputation", but it's hard to tell what this case represents, based on the limited information. So the actual things he sued them with are silly, but I wonder if there isn't something less crazy that he could have tried.