Earlier quoted context omitted.
You can't really trust bookmarks either. Most of my bookmarks are dead either because the site is now gone or because some blog author decided to change their path format and didn't bother setup 301 redirects.
Microsoft's help pages are the worst for this. "Oooh, confusing .NET problem I'll google a response - Hey, a nice forum-post explaining that MS has a document telling me how to handle this issue click NOOOOOOOOOOOOO".
It's really unhelpful.
edit: Actually I just checked and it looks like they've eased up on the need for logging in, I guess they saw too much of a backlash. (Or just flip flopped their own decision again.)