goodroi - 5:12 pm on Jun 18, 2012 (gmt 0)
URL forwarding is often just sales speak for a 301 redirect. Google historically has had trouble dealing with multiple redirects. You could try running several consecutive redirects using urls that are blocked via robots.txt. That will make it harder on Google. It does not guarantee Google won't be able to follow it since they can get data from chrome users and users with Google toolbars.