FM Radio Stations Used for Sirius Radio

So there is another thing that pisses me off on this XM and Sirius Radio thing. If a radio does not have any input jacks you can have the unit broadcast to an unused FM station of your choice and play the music through your radio that way. Pretty simple, pick a low frequency and away you go.

The issue arises when you are traveling and the unused radio stations vary and you have to change the frequency that the unit uses every hour or so. Can't the government say "wait a minute, lets pick one frequency and not use it so that any proximity device that wants to use it can." This is not the first time a device was invented that broadcasts over the radio. I seem to remember this method being used since the first portable CD players.

Also how hard would it be to put a quarter inch stereo plug in the front of a stereo for input, the things cost $500 from the dealer anyway.