Maybe that kind of study would be useful as well. This is more an "information gathering" (as opposed to "conclusion producing") survey than anything else. It will bring in a wide array of data on what people do and don't find useful using basic criteria of efficacy, ease, and comfort.
That's the reason this survey is almost entirely essay-based in form, and does not ask specific questions - honestly, no one person can claim they know all the questions. Yet. :o)
Once this information is all together and a general picture is together, I'd like to plan on releasing another survey asking specific questions and I have to say that I love your idea of stable group to study. This will be by far the most difficult to do, and I'd like to have very specific protocol to test.
Honestly, I'm hoping that at least starting with this analysis, Liver Flushing will become more stable, reputable, and 'public'. Lofty goals? Damn straight.
note: add sections on prior diet/lifestyle questions.