Radio-free campgrounds in Ontario are also almost always dog-free campgrounds; that's an indication of the amount of tolerance for noise in these areas. Campers want to sit outside, enjoy a campfire and the sounds of the night. They do not want to hear air conditioners or furnaces blasting, and they most certainly don't want to hear the mumbled tv noises coming from inside your camper.
Ontario Parks is very clear that only personal devices using headphones are allowed in radio-free campgrounds.
There are plenty of campsites that are not radio-free. Noise and behaviour rules apply in those sites as well - its not party central; these are quiet, family-friendly sites. If you like to sit inside and watch a movie at night, the radio-allowed sites are where you want to be.