Ok... If we place an ip filter would it work against dynamic ip's, or ip changing software? and a hashfilter along with a size filter? we need to do something about this. Even if spam gets bigger, who will want their computers uploading huge files constantly? I think a passive size filter on the user end would help. A hash verification process would be even better as you said along with a size filter on the user end would probably be the best way to go, Bitzi has done an awsome job at identifying files by bitprints, why not use bitzi then to filter out of the network alltoghether files with prints that have negative comments, or are confirmed corrupt, a virus, etc....?? let's say after receiving 6 negative comments, a file gets banned... or reviewed and banned...
I think it is worth a try, maybe they should just do it and see what happens.