This document collects reported cases where the anti-circumvention provisions of the DMCA have been invoked not against pirates, but against consumers, scientists, and legitimate competitors.
In practice, the anti-circumvention provisions have been used to stifle a wide array of legitimate activities, rather than to stop copyright infringement.

Yesterday, Microsoft’s search engine Bing was down for a period of time, displaying only a cryptic 
A TV station in Alabama is learning that live Twitter billboards sometimes deliver unintended consequences.