As I understand it, hosts tend to have AUPs that restrict speech more than the first amendment does, but peering arrangements don't do the same-- correct me if

As I understand it, hosts tend to have AUPs that restrict speech more than the first amendment does, but peering arrangements don't do the same-- correct me if I'm wrong, though! There are data centers that are popular with hax0rs because they don't validate source IP on outbound packets, thereby allowing people to run reflection DDoS attacks. You can visit hacker forums and get a list of these. There are still a ton of AS's in the world doing this, and no one is unpeering them even though they do huge damage to core infrastructure. On the other hand, if you try that on a well-policed data center like AWS, you'll be either blocked by automated tools or dropped as a customer (or both). That illustrates the difference between how customers are treated and how peers are. Spam is a bit different because email providers just block IPs and AS's that are major spammers. This is done with a simple firewall policy and has nothing to do with peering.