I just read this. Whatever your feelings are regarding the Polanski case and arrest, I am sure you will agree that having Woody Allen on Polanski's side doesn't really build up his case. If I were Woody and really wanted to help, I would butt out and distance myself as much as possible from this petition.
Ironically, I haven't seen Steven Spielberg among the signatories for Polanski's immediate release. It might have something to do with Spielberg's being a father of a few teenage daughters. It might not, but who knows for sure?