I think calling Clark a complete fraud is similar to blindly believing everything she says. I fall somewhere in between. While she brings many good things to the table, I think many of her claims are also dubious.
My biggest worry is that people who get some relief tend to believe in her advanced cures (HIV, advanced cancer, MS, etc.). People are impressed with the low level remedies (liver flush, kidney flush, cleanses, etc.). Most of these arguably existed long before Clark in various forms. Some people tend to think "If she cured my gallstones, she can cure my cancer."