One provision of the DMCA act is that every three years, the community can petition for exemptions to the no-hacking clause. A popular theme this year is a request of exemptions which allow users to unlock DRM if the authentication scheme goes awry (e.g. the central server crashes, the vendor goes out of business, or you lose your license in a disk crash.) Another is a request to expand the rights of instructors to rip clips from DVDs (even if they are not doing a film studies course).
Interestingly some requests are for continuations of exemptions already granted (e.g. Braille readers).