Yes, William, people who drive souped-up sports car and waste gas revving the engine have little room to talk about "gas guzzling SUVs". But they don't – as you suggest – need to ride bikes everywhere to criticize a waste of fuel when they see it. Anyone who uses an SUV to commute alone to work is not being fuel-responsible. We all (I'm guessing) waste fuel and resources in various ways throughout a day. We should be limiting our contributions to this waste (which can mean calling a sports car a gas guzzler). If I can argue using along your lines, William, then fuel efficiency "is largely a reflection of a driver's abilities". And if you're not being careful with out resources, then prepare for the fall out.
[Source: The Truth About Cars] - EDITED FROM ORIGINAL POST