There will be massive problems with this. First there is no legal requirement that anybody even possess identification much less carry it on their person. No law requires a person to have a driver's license (of course he won't be able to drive), and nobody is required to obtain other forms of picture ID. The fact is, I've known people to leave the house without their ID, for whatever misguided reason. Not a good idea, but that's not the point. We can be certain that some legitimate US citizens are going to be questioned and unable to produce ID. They will hauled in, and questioned, probably have to phone a friend or parents to come to the station bring in their ID which is in the wallet that they left in their pants pocket. This amounts to a big fustercluck that wastes time, money and law enforcement resources. I'm in favor of widespread civil disobedience among legitimate US citizens who are questioned. I'd love to hear what the ACLU thinks about all this.