You might want to try informing search engine admins as well. I believe some sites like these have done a lot of spoofing (or whatever it's called) which is using an automated script that repeatedly searches for their own pages so they end up getting priority on lists. I could swear I've seen the sites you mentioned before as the first few entries using the keywords "3D models". Most people are lazy (myself not excluded) in searches, so you know what kind of problems that could cause...

---

Barbequed Pixels?

Your friendly neighborhood Wings3D nut.
Also feel free to browse my freebies at ShareCG.
There might be something worth downloading.