Guys done the same thing on a server I was on yesterday, claiming he was the host, again, like all the reports here, EVEN THOUGH the HOST was in the game, guy's a jackass.
Funny story, he decided to join as one of his aliases, (I think Silver the Hedgehog), then decided to say "dakota jones is a rooster sucker" or something along those lines, then quit and rejoined back as Dakota jones, everyone called him on his bullstuff, and he left a few minutes later. Had a good laugh out of it.