I've linked an artice posted by David Wong from Cracked.com
Altho it is a humor artice I found that it drove home a very interesting point with the #1
Forcing everyone who logs in to have a PIN number seems very possible and could put an end to alot of piracy on the web.
Frogboy has posted a few threads about piracy and what would be viable copyright protection. It looks like the best is something nobody would want.