When some anonymous wit started the Mad Men Twitter feeds, it was kind of genius — the fact that AMC inanely tried to shut down the free publicity just made the whole crackpot endeavor even more appealing. But now Showtime is jumping on the bandwagon, creating a Twitter account for Californication's manipulative 17-year-old antagonist, Mia. A sample update: "I just turned seventeen I enjoy Chuck Palahniuk, swimming and sex." Sigh. There's a lesson here, and it's that corporate promotions should just leave this stuff to the obsessive fans. [Twitter via Pop Candy]