@contrex,
Sort of related: I had DSL which as "always on" and came into my home over coaxial cable. I had a lot of problems at first, until a service technician finally came by on a Saturday, and told me that a damper had been put on the box outside to prevent me from "stealing" the cable television service. I explained to him that i don't watch television, and after a great deal of trouble convincing him that that was true, he removed the damper. I showed him that the coax went directly into the back of my "box," and that it was in no way connected to the fine, 20" television i had, which i only used to play console video games. Every few months, i had to call the company and set up an appointment to get a service tech to come on Saturday, and go through the entire rigamaole again. I finally convinced the ISP to give me a letter to show a service tech if one came by. (It's easy to spot someone prowling around, even though their intent isn't nefarious.) Invariably, they would say, "You don't watch television," as a statement, not a question. It was clear that they didn't believe me, and thought i was lying so that i could "steal" the television signal.
"Everybody watches tee-vee!"