We had those in Austria (they changed it so everybody is forced to pay for that now...). They basically have no rights themselves, but they pretended to do and even try to force you to allow them to enter so they can check that you have no TV receiver (including the built in ones in the TV) and say that they will come with the police and a search warrant if you deny them. It doesn't even matter if you have no antenna or no coax cable.
