There are sometimes, though, when one doesn't want search stuff to be kept track of. Especially if one would like to have personalized Google pages at several PCs.
E.g. some humor isn't appropriate for work, but is fun to keep track of at home.
I guess it would be possible to have several Google accounts, but then it can be easy to lose track of which is which...
Plus, there's the issue of - Do you really want Google keeping track of things in one place like that? It would make it much easier for an embarrasing [link|http://www.techweb.com/article/printableArticle.jhtml;jsessionid=CHEFV5UXQ2GM4QSNDLRSKHSCJUNN2JVN?articleID=191900799&site_section=700028|AOL MeToo]...
Cheers,
Scott.
(Who's selectively paranoid about such things...)