Segnosaur
Penultimate Amazing
First of all, even if the interview was used for an ad, wouldn't he have still needed to give permission for his image to be used in the ad itself? (Not sure if using him in ads constitutes 'fair use'.)It's not an ad, it's an interview that was used for an ad.
Secondly, even if his main interaction with PETA was for an interview (and not an ad campaign), he still sat down and gave credibility to one of the most nutty, idiotic organizations out there.
If it had been me getting interviewed by PETA, I'd spend the time asking them things like "So, did you ever get the money back that you lent to the guy who firebombed research labs?" and "Do you know that AIDS organizations disagree with your anti-animal testing stance?"