With modern TV sets, you can easily block out freeview channels from the menu , so it must be easy for the BBC to scramble their signal, then if someone subscribes to them, unscramble it. Satellite boxes have been doing it for 30 + years, now.....Yes I subscribe to Netflix even though my UO declares it as tit! but I am not paying for something which is there when I turn on the TV pah!
If BBC want people to pay up so badly perhaps they should make it an opt in service like above Just because it is there and I can watch it for free if I really want to sometimes I do for the craic, nothing and nobody can guilt trip me into paying for something which is already there, if you wish to pay for it great. Paying the TV licence is a mugs game, if anyone feels strongly about it feel free to pay for it on my behalf!
It would solve the problem over buying a licence, especially if people don't watch them or listen to radio2, 4 etc