What if I'm a link spammer, then I'd love to have google's list. How can the list be more extensive than google? That is verifiably false. For example, generate a list of IP addresses(500,000+) that have the following characteristics:
1. Have websites that been indexed by google with a PR 2+.
2. Run Web Servers
3. Bonus Points if you can tell me which web servers run the most PR 2+ sites.
Now hopefully you can see how useful this list would be! I don't think nmap will do that for you.
> You are very confused. Asking google for a list of IPs does not provide you with their page rank. IPs are not domains, nor are they websites
No, you are again correct. But if I know the IP address and the domains associated with it's very easy to determine PR 2+ websites and also from there figure out which ones have multiple websites hosted on them.
1. Have websites that been indexed by google with a PR 2+.
2. Run Web Servers
3. Bonus Points if you can tell me which web servers run the most PR 2+ sites.
Now hopefully you can see how useful this list would be! I don't think nmap will do that for you.