You've probably heard of RBL's and DNSBL's. These are "realtime" blacklists which some system and network administrators use to filter who can send mail to their servers.
Now, I've been thinking. Spammers HAVE to make their money somehow. This means there is someone paying them. They have a customer of three. So how would you stop the spammer from making money from customers? Hijack their web sites the same way crackers can. If you are an ISP this is easy. You take the primary DNS server and add a bogus entry in it for the spammer's domain. Wildcard CNAME it to a server where the customer can see what is happening and get an explanation and some other more legitimate resources.
I'm not saying anyone chouls do this by default. I'm saying it should be a choice. A value added service to be protected from spammer's web sites. What would this require? Simply put, it would require a highly responsive group to maintain the blacklist of domains, adding new ones and removing those whic hare accidentally added.
But it could be done.
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