I've had it go both ways before, some people assuming that I don't ride a bike out of a positive choice ( but because of finances, dui, whatever) and others assuming that I must be a VERY interesting, unique person since I'm a cyclist...green, extra fit, etc. hah...
As more and more people seem to be struggling financially, I don't think there should be any shame at all in cycling because you're thrifty...
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May you live long, live strong, and live happy!