I disagree, for a number of reasons.

1. I don't agree with the statement "shoplifting is necessarily immoral" so it makes no sense for my own argument to hinge on such a fact. 2. My argument does not only work for an immoral crime; it is merely illustrated by an example of a law people think is not wrong. Shoplifting is merely a counterexample to the logic "If X is a law that a lot of people break then X is a bad law". I do not take this on to conclude that X is not a bad law which would be begging the question. 3. The original logic was begging the question, not I. The statement "If X is a law that a lot of people break then X is a bad law" only holds if X is already a priori a bad law (and, even then, it requires a few more statements to actually work).