This is a situation ripe for regulation. Feel free to filter by port or ip subnet, maybe we can talk about DPI, but modifying clearly needs to be a crime. There

This is a situation ripe for regulation. Feel free to filter by port or ip subnet, maybe we can talk about DPI, but modifying clearly needs to be a crime. There may not be an expectation of privacy, but there is certainly one that the integrity of the technical systems we use is not violated.