The base where I work uses some of the most arbitrary web-blocking filters I’ve ever seen. Yesterday, I could get to ScienceBlogs, today they’re listed as forbidden because they are “Reference/Education” pages. Yes, we wouldn’t want anyone here at the Air Education and Training Command to get to any sort of reference or education page.
My personal website has been blocked today (but not yesterday), listed as a “Forum/Bulletin Board.” Strangely, I can still get to Rush Limbaugh; I’m sure that’s official government use there. Al Franken’s campaign page is blocked for being a “Personal Page” – no political slant at all there, is there?
The web filtering they’ve had in place has gotten ever-more draconian over the years, to the point that I’m actually surprised if a hyperlink does not end in an “Access Denied” page. Science Blogs has got to be the top of the WTF list, though.