Must take exception with the discussion of the SWF. The main problem with it described here is the uptake of sodium. If we took in the salt added to the flush then I would agree with you. However,
A SWF (Salt-Water-Flush) is Sea Salt added to luke warm water. Its purpose in the flush is to create the needed gravity to move the water quickly through the digestive track. Salt and warm water combine to flush the system in a way that prevent absorption of the salt OR the water. So the concern over the sodium is irrelevant.
Now in fairness I am not a scientist or medical practitioner of any kind. This information has been gleaned from much research. It is quite possible that it was all a pack of lies, but that is the principle. I don't think anyone would condone the ingestion of so much sodium, and certainly not on any kind of fast.