the title of: Porn Star

I'm not a big porn guy, but let me ask you a question: Why is it that if some lost soul does a porn film or becomes a porn actor, and then s/he does something stupid, or at least news worthy, they automatically get elevated the title Porn Star? That's like some accountant who for some reason is arrested for public urination being written about in the news: Accountant/Bean Counter Extraordinaire Arrested Early Sunday Morning for Taking a Piss in Public.