I agree that informed consent would be one thing to mitigate or avoid harm. It's part of running an ethical biz. But to be honest I don't even recognize the basic legitimacy of drawing out someone's deepest longings and desires, and then attempting to use that as a therapeutic device. The potential for violating "first do no harm" seems too high. Unless the profession can show that it consistently avoids harming people with this practice, it ought to stop.