Copyright and intellectual property rights are constantly being extended and enforced, with the latest efforts even being linked to national security.
From the extension of copyright and DMCA to SOPA and PROTECT, corporations are constantly finding ways to legislate blind enforcement only policies.
This leaves behind the public interest of fair use and public domain. Just as American ingenuity drives the IP we're trying to protect, our founding fathers knew that putting IP in public reach was important for continued innovation.
Since fair use and public domain are only "defensible", the increasing extensions without consumer rights being considered only serve to strip future generations of the same public culture the companies arguing for more enforcement enjoyed in their beginnings.