>They have to detect and prevent DDoS from their customers, detect and prevent malware, as well as child pornography and stuff. What makes you think they don't

>They have to detect and prevent DDoS from their customers, detect and prevent malware, as well as child pornography and stuff. What makes you think they don't do this already? I can't run a mail server on port 25. I call my ISP and ask why. They tell me they are combatting open relays, and I need to accept a business class agreement with them to open the port. ISPs have data retention policies to assist law enforcement with investigations into criminal activity. They will terminate your account for breaking the law as well. https://www.wired.com/2010/01/verizon-terminating-internet-accessinternet-access/ https://www.wired.com/2010/01/verizon-terminating-internet-a... It's their network. They are motivated to protect it.