I'm not paranoid about the bands, in fact I have gone on record a number of times about just how much BS that topic was, but, I find the cards to be more convenient for me and less in the way. A small card is no where near as troublesome as a wrist band in my mind. And I am not to lazy to get it out of my pocket. Personally, they can track me in the park, just like they have been doing for years anyway via camera's, all they want. Nothing at all changes anything other then they know where most of the people are at any given time.