You can easily opt out of PageRank: put the links behind a redirector, and hide that redirector using a robots.txt.
Ie turn http://example.com/foobar/ into http://george.hotelling.net/redir/example.com/foobar/, have the server rewrite that to a 301 redirect to http://example.com/foobar/. Then tweak your robots.txt to forbid Google from spidering http://george.hotelling.net/redir/ and presto.