There is no reason to be frightened or worried about liver flushing. It is simply an exaggerated and accelerated version of what the body does naturally every time you eat. Some of the tastes are pretty bad. I don't know anyone who willingly drinks Epsom Salt for the fun of it.
When I started doing regular flushes it was because I had a gallbladder attack that was one of the most painful experiences ever (and I am a chronic pain sufferer). Young people who have had a healthy Diet and lifestyle for most of their lives might be able to do a simple detox cleanse with herbs. However, those who have years of bad diet, drugs, stress, and other factors probably need to flush first. Anyone with definite symptoms of Gallstones definitely need to do a series of flushes to clear out liver congestion before starting an herbal cleanse.
For the vast majority of people liver and gallbladder flushing is safe, easy, and most of all, effective.