From NameSilo regarding an alleged malware domain:
Hi Thomas, We would like to help expedite this since it involves potential malware, but you don't give us much to go on here. Can you please review: http://www.namesilo.com/Support/Abuse-Reporting-Procedures
This domain name is operated by cybercriminals and used to provide DNS resolution to botnet domains, aimed to steal thousands of $$$ from financial institutions. Please suspend it.
So in short - the registrar asked for evidence that the domain was violating their terms of service and spamhaus simply replies they are cybercriminals... trust us! After seeing other abuse reports from them, I can tell you that spamhaus has a very snub attitude and expects to be listened to. Once when Namesilo did not listen to them enough to their liking, they added namesilo.com to their RBL - they had me modify their MTA to route email around the block, but still - I think you can see the problem here - someone has to keep spamhaus in check.