It prevents all manner of kidnappings, bank robberies, ordinary crime where the get-away vehicle is a car or truck. Rewind to the time and place of the crime, watch where they go. On the negative side is the power this would give a bad agent. If only govt were staffed in good angels, we wouldn't have anything to worry about. Alas they are normal humans. I think this will be the future in most metropolitan areas within a few short years. The benefits simply outweigh the risks of mistreatment. Interdicting crimes against innocents makes a great deal of sense to me. Allowing rogue govt agents to make nefarious use also alarms me. Perhaps access needs to be guarded, justified? I don't have a good answer, but the amount of good that can result from this type of tech is difficult to deny. Kidnap a child and you are visited by law enforcement immediately. Would render a broad spectrum of criminal activity moot. Also could liberate falsely accused. The good uses of this type of tech are fairly profound.