I know most states don't have the money or manpower to enforce their contracting laws which sad for the business owners and the consumers. In the early 80's in California I advertised in the California Shopper and Pennysaver. You are also required to have your license # displayed in ads, and I didn't at one time. So I get a call for a small job and as details and are talked about the customer request my license #, after I gave it to her she stated that she is an enforcement officer with the CSLB. She went on to state that a review of the license and check for complaints would be made and if the board determined I would be notified if a charge against me would be made. Fortunately nothing ever came from this. As far as WC goes if an unlicensed person works at your home or business it is my understanding that if that person gets hurt while working on your property your responsible and liable in a lawsuit.