California marijuana growers and French sex workers have something in common these days. Both fear the legalization of their trade.

You’d think both would welcome conducting their business within the confines of the law for a change, but that’s not the case.

Pot growers and prostitutes feel they can make more money by keeping their trades illicit. And, of course, they can.

Those of us who work for or own legitimate businesses can attest to that fact. We are subjected to a range of taxes and costs of doing business.

If California voters legalize ...