As good, decent, law-abiding citizens - we should notify the government whenever we leave our homes, its for our own protection and security of course.
Pretty soon, just as soon as we all have our personal "On-Star" chips embedded, reporting in will be achieved passively.
That way when we leave stores with products, the data from RFID's will be merged with with our own personal GPS info so Wal-Mart will know who bought what and where it's going.
If you don't have anything to hide -- why would you mind ??
We've just got to catch those wrascally terrorists and drug pushers.