The knowledge generated by we humans is a common wealth. The following executive summary is from the Free Expression Policy Project at the Brennan Center for Justice, NYU School of Law
http://www.fepproject.org/...

"recommendations include creating a clearinghouse for information,
including sample replies to cease and desist letters and take-down
notices; a legal support network; outreach to Internet service providers
to encourage help for those targeted by take-down letters; and changes
in the law to reduce the cost of guessing wrong about fair use."

The summary follows: