|Electronic Frontier Foundation|
There are lots more. This is important. I will note that Pedantic Political Ponderings is not dark because it is a tiny blog (about fifty to one hundred viewers per day) and I am new enough to blogging that I don't know how to black out this site.
Midday Update from YouTube:
22 November 2011, Original Pedantic Political Ponderings post.
20 January 2012, FollowUp 2.
21 January 2012, FollowUp 3.