This gives me an idea; perhaps PG could deliver some sort of anonymized hash of poster IPs to us so that a user can choose to ignore everyone from the anonymize

This gives me an idea; perhaps PG could deliver some sort of anonymized hash of poster IPs to us so that a user can choose to ignore everyone from the anonymized IP. I'm reminded of old-time slashdot -- I banned jonkatz from showing up anywhere on my slashdot pages. It was bliss.