[croutonwagon]

Whois abuse reporting is the solution that is already in place and comes to mind. If you NAT segments of your network and mask your userbase from the greater internet, you inherit some responsibility for their actions, same with smtp spam as any other service.

But many carriers simply ignore or don’t respond, much less investigate. To the point that people regularly take to other means to establish backend contact with larger carriers like Comcast, resorting to list serves like nanog.

Ultimately it’s on the carriers to doll out the money to support it. But they could easily implement strike policies like DMCA reports have for many. Against both customers engaging in malicious activity snd reporters abusing the system or making spurious reports that waste resources.

However that would mean carriers like comcast would need to stop their efforts to completely frustrate communication with other NOC's etc.