My brother had RR, and he used to do the cable thiefing trick. Where you splice your cable modem wire and hook it up to your tv (you can't do this anymore) and then cancel your cable while keeping rr.
He eventually canceled RR, and they never shut the RR line down because he just handed the modem back. It was a seperate wire from the main cable, so they had no idea.
He had free cable for over a year untill he moved.