I have not heard what happens if you don't have ID. What if you're under 16, and not eligible for a driver's license or state ID? What if you are from abroad and not carrying your passport with you daily, or it has expired? Or from out of state and didn't know?

What if you do produce ID and they don't like what it says?

We all heard about people stopped for "driving while black" a couple years ago - now it sounds like you'd better not be taking the subway while Middle Eastern.