Agreed, apparently the "sin tax" is already being levied against the SUV owner, in the way of the gas tax. At 11 MPG those 23.5 cents multiply pretty quickly. It's (once again) all about buzzwords. SUV, Cell Phone, WMD, Militia, all of these words have been thrown around by those on either side of an issue, in order to elicit a desired response. All of them raise some legitimate issues, but it's not always the legitimate issue that gets the buzz.
Where I live, there is also a lot of complaining about SUVs. The ironic part of the controversy here is, we have a higher than normal number of busses in our city transit system, most the time these busses are completely empty, yet the same people who complain about "those SUVs" come down pretty hard on anyone who dares mention the environmental, financial or wear and tear problems caused by the city's own busses.
As long as social engineering is one of the powers that inherently comes with the authority to levy taxes, I guess we're going to see more and more of it. The sad part is, it will be at the insistance of "We, the People" that it happens.