aristotle - 8:53 pm on Oct 17, 2011 (gmt 0)

In my opinion you should avoid putting the nofollow tag on any links except in special circumstances, so unless I'm missing something I don't think you should use it for "back to top" links .

Returning to your original question about the Privacy Policy page, it occurred to me that using robots.txt to block Google from crawling it might be worth considering.