
"But if an agency tries to use the data to catch known terrorists, then let the worldwide media screaming commence."
If you know who they are, you don't actually need to mine anyone's data.
Data mining vis a vis terrorist hunting is simply no more than a fishing trip to identify people who *might* be terrorists.
Look at it this way, punters don't mind giving up a certain amount of data about their shopping habits to retailer loyalty schemes because the worse that can happen is they might get some vouchers for products they don't actually want.
Even in the case of a total breach of the happy shopper database, the world might find out they bought some pile cream at Asda, mild embarrassment all round, or their junk mail input might rise. Annoying, but not exactly life threatening.
It's a bit worse when this data finds it's way into the terror data mine, because then the worse that can happen is that the mining algorithm finds you bought piping, nails and weed killer from a DIY store, sugar and soap flakes from the supermarket, and lots of petrol from the station, fingers you as a bomb wielding jihadi, and you are woken up by the sound of armed police officers kicking in your door at 4am in the morning. If you survive this, you face long periods of detention without charge or legal representation and possibly torture and/or incarceration without trial, depending where you live, and what your surname is.
I'd say that's quite a big difference.
As for the whole "socialist agenda, leftist concerns" thing, I have no idea what you're on about. I suspect you're just a batshit crazy yank with a limited political vocabulary, something that is borne out by your concern that your local shop might "[turn] you over to Chinese or Israeli government agents". (An interesting juxtaposition, since Israel is your number one best bosom buddy ally)
I suggest switching to decaf.