The details of this situation are not mine to hand out here so all I can say is that a group of Wiccans have decided to boycott a festival due to the possible involvement of Satanists. They say that Satanists are not Pagans and so therefore should not be allowed to participate. I think this is ridiculous but my technical question is this: does the CoS consider itself a form of Paganism?

Yaz

No. The Church of Satan in no way identifies itself or the practice of Satanism as related in an even vague fashion to paganism or any other religion.