Not if the item was produced by a a party other than the parties pushing for SOPA and its ilk. I think piracy is generally bad, I just think financing groups that want to destroy the internet is worse. Think of it as a transmogrification of the MPAA mandated warnings at the beginning of movies telling you that if you buy from pirates you're supporting drugs / terrorism / human smuggling / pick your poison.

If you buy from SOPA supporters, you're supporting the death of the internet.