For a site i have users can generate forum signatures to use on other sites that track their progress in a game. These are being used and i'm getting essentially free banner ad placement from them as they look pretty sweet and have my logo etc etc. They are linked to my site obviously. However i don't really want thousands of no follow, no text, image links (which is happening already) pointing to my site. What are my options here? I could get another domain and route it through that with a 302 to not pass anything. But i feel thats gonna look a little fishy to google. Any ideas?