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Movie industry demands US law requiring ISPs to block piracy websites
(arstechnica.com)
This is a most excellent place for technology news and articles.
If you commission the artist to make you a painting, with some portion of the price being a cut of the revenue generated by displaying the painting, you absolutely should not be permitted to just throw it in the trash.
There should be an inherent obligation to make a good faith effort to make the revenue you're required to share.