I don't exceed the speed limit EVER except when passing; in general I run 5 to 10 UNDER the limit to save gas, and I tend to draft semis for the same reason. I'm pretty supportive of being serious about the speed limit.
And **I** think that's an idiotic thing. I hadn't heard about it. I'd think "wasting gas" is its own punishment. If I bought a gallon of gasoline, why does the state get to tell me what I can do with it? Are they going to ticket me if I pour it into a pan and light it just to watch it burn? How about if I mow the lawn a few more times than is absolutely necessary?