Don't Punish Owners of Gas Guzzlers

The Cafferty File, part of The Situation Room on CNN, poses a question every hour The Situation Room is on. This is today's 7:00 question, and a response.
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Is it a good idea to penalize drivers who buy gas-guzzling vehicles?

No matter how disastrous global warming will be, punishing those who buy Hummers and other similar cars would not be the right thing to do. Instead, how about the gas guzzlers are never made, much less sold. The U.S. could decrease its dependency on foreign oil, slow global warming, and save money on gas. If owners of Hummers were punished, only more money would be wasted.