Copyright incentives and rewards to producers of works have been able to exist alongside other values, such as freedom of expression. However, changes in the way information products are being disseminated raise questions as to whether those values remain compatible with the new modes of dissemination.
So far, studies devoted to digital rights management (DRM) and copyright exceptions have noted, theoretically, its legal implications. This research filled an existing gap by looking at the impact of DRM on the ability of users to take advantage of certain exceptions to copyright through empirical lines of enquiry. […]
Conclusion (1): Although DRM has not impacted on many acts permitted by law, certain permitted acts are being adversely affected by the use of DRM. […]
Conclusion (2): This is in spite of the existence of technological solutions (enabling partitioning and authentication of users) to accommodate those permitted acts. […]
http://www.ip-watch.org/weblog/2009/05/25/freedom-of-expression-versus-drm-the-first-empirical-assessment/