Perhaps you should read Hv's forum, and you would see that he gives advice and warnings on a great many subjects, including those you have mentioned, before you start making suggestions.
How do you know no-one has died from these liver/gallbladder flushes? Do you know everyone who has tried them? More false assumptions.
Hv has also discussed many ways in which these flushes could be beneficial, (again, read his forum before you make assumptions), and how they could be potentially very dangerous. Its always good to have a balanced view.