Sometimes I think that too. I do not care to know about a person's private life in a store. I have one and I hardly ever use it. Since I am in the car by myself, I do take it if I remember which is not too often. I never use more than a few minutes a month and most months, I never use any at all.
Geez, I've heard business calls, phonesex, personal calls, wakeup calls, emergency calls and whatever. This was from the same person in Dulles in a 25 minute period.