Why would the owner, who has already shut down his firm thus avoiding legal liability, even bother to show up, let alone comply with any ruling?
We have not heard of anyone getting the shop owners to court. The scams are not conducted by individual owners, but by an organized cartel that is protected at the highest levels. What you will find is that at every turn people will try to discourage you–your paperwork will not be complete so everything is delayed, the police will give you a friendly warning that the gem owners will send people to beat you up, etc. If you had the time and money, it would be nice to try something like this just to bring attention to this problem. Thais are sometimes shamed by bad publicity.