I know everyone is tired of IP address issues, and even more tired of spam, but I think this has some operational content. I'm sure that a good number of network operators have set up null0 routes for some of the more annoying spam sites, and I'm pretty sure that many people are sending whole /24s and maybe even larger blocks to null0 because of lack of response by the spam sites. What is going to happen when the spammers find that they are unable to reach 30% of their mailing list because of null0 routes? The spam sites just renumber into another network. Eventually the spam sites, or their upstream provider, will have to request more addresses from Arin, and this is where we might be able to gain another tool to fight spam. All address allocation requests have to be justified, I think that we can use this to prevent additional allocations to spam sites. The reasoning is that spam sites are not using their previously allocated space efficiently, and have poisoned their existing blocks enough so that even if they were to give them back to Arin, Arin would be in a very perilous legal position if they were to re-allocate these block. Basically, once an address is associated with spam, it is not going to be globally reachable until all null0 routes for it are removed. I'm open to any and all comments, suggestions, corrections, or flames on this. Jeremiah