You are naive aren't you? Large corporations pay enormous sums of money to probe every orifice in your body. Nothing wrong with that if you're a sheep or a cow, but as far as I'm concerned willingly putting on an electronic collar - in the metaphorical sense - is a little too much.
As I alluded to, you aren't that naive, are you?
My exact point. You are "truly free" to take that course of action. That is the beauty of being a U.S. citizen.
And more power to you for exerting your freedom of choice.