Forget about data privacy my friend. As long as it suits the government it will be shared. I remember we discussed this on another friend and someone said that they knew someone who worked in an electronics store and it was their job to send details of new TV purchases to Billag. I've been told that Billag also receives details of new registrations when people move to an area. But since this is dependant on 4000 different communities sending the data in, it might not always happen.

See this thread for more discussion on data protection