What next?
I share files via RapidShare - all of them fully legal (in fact no-one outside my geographically-extended family has access). So far not a problem. But how do they propose this filtering is actually done? One thing that would have me quitting RapidShare very quickly indeed would be any notion that anyone besides myself and the intended recipients knew the contents of my files.
This sort of nonsense isn't about what is and isn't legal on such file-storing websites. It's about whose has the right to pry into private files. When I post a letter, I don't seal it because I have something to hide - I seal it because the contents are private. If those contents are none of the business of police and govt, then they're certainly none of the business of the commercial media industry. If that's an accepted principle of postal services, I can't see why there should be a problem with transferring private information online.
Or to put it another way - have isps, or indeed the media industry - ever heard the children's tale of the Goose Who Laid the Golden Eggs?
Destroy one of the only remaining expanding industries, why don't you? Duh!