The FTC is about to begin an investigation of the National Football League, Major League Baseball, and several other organizations at the instigation of the Computer & Communications Industry Association (representing Google, Microsoft, Yahoo, et al). At issue is the practice of overstating copyright claims and in particular disregarding Fair Use.

http://www.ccianet.org/artmanager/publish/news/
FTC_copyright_complaint.shtml

The CCIA has also established a Web site to track this issue:

http://www.defendfairuse.org/

Some examples of overstated notices can be found at:

http://www.defendfairuse.org/abuse_examples.html