I do not understand why giving feedback about the usability of the link deserves downvotes. I didn't even understand what had happened when I was suddenly at a google log-in, shrugged, and closed the tab.
Funny thing is, if it were a Facebook login wall, tens of upvotes would have ensued.
I don't comment with the expectation of up votes. Infact, I commented that just to warn others that they'd be staring at a google-wall.
Anyone else remember when you didn't have to log into google groups to look at a newsgroup thread?