This doesn't really apply to Google
Google, it could be argued has substantial non-infringing uses. The fact that it may throw up links to torrents of copyrighted material is unfortunate, but that is not its raison d'etre. This is not a defence open to The Pirate Bay. In the first page of hits for 'Browse Movies' at the moment I see Watchmen, Hotel for Dogs, Monsters vs. Aliens, Tropic Thunder, Wolverine...
Despite the plucky rhetoric of the PB apologists, the Pirate Bay exists purely as a resource to enable unprincipled cheapskates to enjoy the product of other people's labours, without any intention of rewarding those labours. Forget the spiel about 'new business models', if this becomes the dominant paradigm for 'consuming culture' then culture will simply not be created - you can play the well-worn card about the ridiculous salaries afforded to the big stars and I'd have a modicum of sympathy, but sets will not be built, lights will not be rigged, sound will not be designed and costumes will not be made if the relatively lowly people involved are not paid. And it's hard to see how the "business model" espoused by PB advocates will pay them. Maybe I'm missing something.