A good portion of my life I worked construction, specifically building stores in malls around the country. I would drive to one job, stay in a hotel until it was finished, then drive to the next. I would easily drive 50,000 miles a year, with the vast majority of it not being in the state that the car was registered in. So, under this system, if I was an Oregon resident, I would have to pay the mileage tax based on my total miles to Oregon to maintain their roads, which I hardly used, while also paying gas taxes in all of the other states that I am actually driving in to maintain their respective road systems. Gee, it's hard to see how I might think this idea is complete bull shit, even without thinking of the privacy aspect.