What if you are out of state? Do they have the mailing address of every car in the US?
Sometimes I wonder if Free Republic is not mostly made up of a bunch of shut-ins who never get outdoors!
Yes, they do have mailing address of the owner of every single vehicle in the USA. It's all tied together through a massive database that is shared not only by toll collectors but by law enforcement as well. Thus a NYC resident gets pulled over for speeding somewhere in Wisconsin and by the time the cop car even rolls to a stop, the owner's information is already displayed on the screen. Now they go through the pantomime of asking for your license and registration but be assured that if you are the owner of the car, the officers already know all about you.
Now as for these "cashless tolls" - they are being rolled out everywhere there are toll roads. You will just be billed, whether you care to put a transponder on your car or not. All the transponder really accomplishes these days is to allow you to have an account where you can view your transactions in one place and pay your tolls all at once.
I live in the NYC area and I routinely run up $40-50 a month in tolls. That number just keeps rising and rising. I expect very soon that my monthly tolls will go over $100/mo because now they have the ability to really sock it to you. Now Connecticut is looking to get into the toll road action. Eventually, the tolls will get so expensive that many will go to public transportation - which is exactly what our overseers have planned for us all in a future state.