There was some discussion of this (potentially restricted speech) at [[Wikipedia Cookbook/Talk]].

[1] BTW, I've now searched for all four terms, and found nothing concrete.

Also, Dr. David Touretzky at carnegie-mellon is knowledgeable about both DeCSS and Adobe encryption and various other first amendment issues ignored by the DMCA (and, it seems, the Church of Scientology); his arguments seem generally lucid and measured; you can visit his page at http://www.cs.cmu.edu/~dst/ if you care to. 0