Google will have to turn over every record of every video watched by YouTube users, including users' names and IP addresses, to Viacom, which is suing Google for allowing clips of its copyright videos to appear on YouTube, a judge ruled Wednesday.
Viacom wants the data to prove that infringing material is more popular than user-created videos, which could be used to increase Google's liability if it is found guilty of contributory infringement.
The judge also turned Google's own defense of its data retention policies -- that IP addresses of computers aren't personally revealing in and of themselves, against it to justify the log dump.
The Electronic Frontier Foundation has already reacted, calling the order a violation of the Video Privacy Protection act that "threatens to expose deeply private information."
Read more and whole lot of comments at wired.