I floated one over at Tapped, and folks seemed fairly hostile, so let's discuss. It would seem that, in urban area where public transport is a truly viable option, using rather draconian methods to disincentivize driving would make sense, particularly if the added cash went into further development of public transport. Lots of folks in DC take cars when they don't need to, and even more do so in SF. Now, I don't think you'll make much of a dent in petroleum usage, but it could be a good revenue stream for cities. In any case, seemed fairly innocuous to me, but since I, again, am against gas taxes, I'm not particularly wedded to it.