I had a number of them too over the decades. Many of the parents are delusional about the problem. I had to remove a few from class over the years as well, usually when they became a physical safety problem. A few stand out and one in particular. In a group, I had three kids with the same first name and I didn't want to use last names or both names so I made it fun and said Johnny1, Johnny2, Johnny3. I guess I should have tried JohnnyC, L, or M by adding their last names. Johnny 2 screamed that he didn't want to be a 2 and his threats started from the first day. He also wanted his name pronounced in full like Maximillion rather than Max and I don't like going with 3 or 4 syllable names that you have to say repeatedly. I ended up saying Hey and pointing at each one. I kept thinking "future stalker or worse" and I'm waiting to read about it. The level of neurosis out there is worrisome for the future. My hope is that sports can help moderate it in all of them.