The thing that would scare me about these cards is the way the data that would be gained on us would be used.
If they set up points where you had to produce these cards in order to gain access to services and places then they would have a vast amount of info that is very profitable to corporations who needs market data etc.
I dont want some market analyst getting info on my spending habits and my day to day life.
Have no doubt that the Government would use this info for voter profiling so if you visited certan places and bought certin things then you might be targeted as a swinging voter and find your mail box full of crap, getting recorded calls of our fearless leader telling us to be "alert and not alramed" coming up to an election etc.
The above mentioned may already be happening here in Oz, I'm not sure but I know it happens in the US from credit card records.
One more......I like going to the beach for a swim or for a morning run and not have to carry a bloody card with me so if the cops ask me if I am a terrorist I can prove I am not???
The culture of fear is such a self fulfilling thing that is used as a corporate and Government tool to destroy any thought that maybe we arent facing the end of the world just yet.
Scotty