bob the bot-herder
even if the author of the Bombastic Bob bot renames his creation as Michael Habel and changes the style generator slightly, that is still run by the same herder.
I think bob has enough technical savvy that he could set up another e-mail account to get another El Reg account. After all, he has his treasured upvote:downvote ratio to be proud of, and that would be wiped out if he changed his handle.
I also doubt that the style generator is amenable to change. I've encountered him elsewhere (the handle there also had "Bob" in it") and although it was clear that he was on very different drugs from usual (ecstasy rather than methamphetamine), the style was recognizably his.