I noticed the same problem when I was with my SO on her PC and showing her how to look for answers re: linux related questions. (she didn't want to register tho)
I found it annoying since I'd been referring people to this site for months as a great linux reference never realizing that they couldn't search....
However, now that I know the reason (and its VERY valid) its not such a turn off. Thanks for elucidating
(and for Winno for asking)