Does that mean that you use this query patterns for a particular URI to delist it, if it is never queried too often from geographically diverse IPs? Or something similar?
Also, do you use the site/URI related info like its contents, how often the SSL gets changed, info like whether the site SSL pretends to be for paypal.com while signed by some russian authority or korean one etc? I assume at least the PH list uses this criteria. Using this technique for other lists also could help to find whether the URI is spammy.
-- cheers, Skar.