Based on my understanding, there's a tightly-locked down outbound firewall: you only get HTTP,HTTPS and SSH ports. So sending mail over SMTP (spamming) can't h

Based on my understanding, there's a tightly-locked down outbound firewall: you only get HTTP,HTTPS and SSH ports. So sending mail over SMTP (spamming) can't happen. If someone is doing something evil over e.g. HTTP, presumably GridSpot can also block that and/or ban them from the system. If you're sending spam over e.g. Gmail via HTTPS, Gmail will shut you down. The people running the nodes don't need to worry about e.g. someone downloading illegal content and getting them in trouble, because it is proxied through GridSpot. I think it's a clever solution.