I thought the rule was no encryption. They theoretically have an entire ip block available.
That said, ham radio is a fun hobby regardless. If you are into IP stuff on ham radio, it's not too hard to get an ip on the ham IP block /8.
Amateur radio does have a tradition of self enforcement which is part of my the FCC continues to grant privileges. People practice RDF for fun but I know people who have used to to find people intentionally interfering with other stations.