Perhaps it does come down to wondering if there is a way to draw a clear boundary between a "Pirate Bay" and a publishing or streaming service with partial overseas operations that has some customers who sometimes do illegal things. And what's illegal sometimes is a matter of controversy.
Update: Jan. 21
Bill Maher actually supported SOPA, in this YouTube video, although he admitted to not having read the bill, and seemed oblivious to the "downstream liability" concerns with regard to user-generated content. Maher says that his own film "Religulous" (2008) was pirated heavily.