The whole idea reminds me of Minority Report in a sense.
Being pre-judged for something you may or may not do in the future, based on circumstantial evidence (which changes on a whim of the authorities).
Now don't get me wrong, I believe in heading crime, and particularly terrorism, off at the pass so to speak, but use solid investigation to do so.
It's just flat wrong to put a "blanket solution" over any and every issue even if it hurts the good guys too (as the libs love to do.... as in one bad man with a gun = all guns and gun owners are bad).