I am the Kat that Walks By Itself

I agree with this post. That boycott sounds likely to have either no effect or negative effect.

Honestly, I think it might be a better idea to deliberately buy music/dvds from sources that you originally discovered via internet activities of dubious legality, then send the companies letters stating that fact. (Said letters might have to go unsigned, since I wouldn't put it past many in the industry to prosecute based on mentions of past piracy.) Point out that illegal sampling of something sometimes leads to legal purchase, and the best way to combat piracy is not to keep stamping out websites while more spring up like hydra heads but to give people less incentive to pirate. Let them access sources from their computers, when it is first released, for free (maybe with ads) or a reasonable price.