Wow this is actually hilarious (i'm sorry but). Idk why people would think that messaging somebody named Username could change their username, does it work like that in other places or what? Either way, it's not really something we can do anything about; this seems to have been going on for a while and there's not really any way we can criminalize the misguided people doing this. My suggestions is that you either in your settings restrict Visitor Messages and turn off Private Messages, or that you create a new account with a different username. Normally we prefer people don't use several accounts, but in your case we'll allow it d: