Where you one of the fellas at the Deerfield motel Squeezy identified above. You made a couple of good points but generally missed the boat on the relevant issue. While the legislature finds it objectionable, I would venture to say that the vast majority of the women on the legitimate boards definitely look at this as a legitimate, professional service industry and act accordingly. They are serious as a heart attack, and expend vast resources in marketing their particular brand, travel and lodging costs, wardrobe, makeup, professional photography, etc. It is hardly underground as anyone with a computer and internet service can see untold examples of what is being offered for hire.
You are right in that there is no legal recourse in the event the contract between the provider and hobbyist is broken or unfulfilled. You are also right that the providers take an enormous risk, despite all of the screening they do, every time they open that door and let a stranger in for his/her first visit. The hobbyist may turn out to be the most kindhearted gentleman in the world, but have the looks and appearance of a deranged serial killer. I know some of the providers make light of this, and rationalize that the beauty of the donation is paramount, but it still amazes me that they do their best to fulfill the gents fantasies and dreams. If that doesn't scream professionalism then nothing does. That is not a description of an underground business.
Which brings me to the point. The entire industry at this point, with the few exceptions where it has been legalized, is self-policing. And the way that is accomplished is through the various online forums where information can be shared and monitored, and issues can be debated in a hopefully rational and sane manner. So the fact of the matter is that when a provider shells out upwards of thousands of dollars to participate in this endeavor, it is my personal opinion that he/she should receive the benefit of what he bargained for. When a provider deliberately manipulates images to falsely enhance their physical being, for the sole purpose of soliciting business, I feel there should be an opportunity to renegotiate the terms of the agreement as there has been a material misrepresentation that misled and induced one side to agree to the terms of the session. I realize that is taboo, for any number of reasons, but in my opinion it would be a fair compromise. I have absolutely no false illusions that this will ever happen, and this is all speculative and hypothetical to begin with, but it's still an opinion, just like the ones you presented, and that is what these board's are all about.