Stupid premise
Why lock people up who never even committed any crimes, even if they were about to? Why would locking up technically innocent people solve anything? They should just be caught about to do it and let off with a stern warning, so they know then that they simply won't get away with it and it will act as the perfect deterrent.
I haven't seen this dumb movie since it came out, and this is exactly the reason why. Spielberg's worst, easily.