In Canada, the supreme court has already rejected this tactic, ruling that there was no way for the industry to tell what these people downloaded or uploaded to the internet.
Now, why do you care? Every piece of digital media that can possibly hold digital information, and by it's nature hold 'pirated' data, is already subject to a levy which is supposed to be given to SOCAN or CIRA artists. Blank CD's DVD's, Computers, MP3 players all carry the levy which is in addition to VHS and cassette tapes. To date, not a penny of this levy has been given to artists.
Do you know what is installed on your computer? Has someone installed KaAzA, or Bearshare or Limewire on your computer, and is your computer sharing songs on the Interent? Do you have $4000 for to give the recording industry's Lawyers when they come knocking to settle out of court? Today the Supreme Court stood up for individuals and is forcing the big corporations to prove things before they start fleecing the Citizens of Canada.
Note: RIAA
DMCA
wrong
innocent
rejected
SOCAN
CIRA
Canada.com Article
CBC Article
Globe Article

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If you don't like these ideas, I've got others. --Marshall McLuhan
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Jesse
Personally, I think that we need copyright reform instead of legal impediments. I'm happy with Canada's approach to the whole issue thus far; let's hope that we can continue to make reasonable decisions without taking away people's rights.
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Jesse