really? he is the best kind of peadophile, a fictional peadophile, he has not hurt anybody.For me, TW only had one good season, CoE. I'm not sure how Americanising is going to work but I'll give it a chance. However, a kiddie-diddler as a recurring character? That's a little off-putting. If it's done as a character with information they need, as Starkers suggested, then maybe... maybe.
I'd imagine that said character will eventually receive a horrific and gruesome death once his usefulness has run out. Although i can understand why such a character would make people uncomfortable.
I don't have a problem with the character myself, like you said he's fictional. But that doesn't mean i can't understand why some people would have issues. For some merely broaching the subject of paedophilia in any form, fiction or otherwise, makes them exceedingly uncomfortable. And the BBC is certain to receive complaints about the character no matter what RTD and co do with him.