Jim,
While your business is different than mine, the copyright issues are the same. As we give up and continue to give away our rights, someday we will wake up and have no rights.

One of your customers steals your photo and to keep her business, you are going to let her get by with stealing your photo. If she doesn't buy her win photos from you in the future, then how will she get them? She is the very kind of person that needs to go to court to teach her that it is not just a matter of "right or wrong", but it is also against the law. If you took this to Federal Court she would go to prison. She would lose her house, her pension and probably everything else she has.

I am beginning to see photographers that are too willing to give up their rights and I fear in the future, there will no longer be a professional photographer because we gave the profession away.