I may be misunderstanding your initial post. I took your suggestion to mean that people should seek out a therapist for the sole purpose of exposing them ALL as frauds. There are some really crappy therapists out there and many nightmarish ones but not all.

Or maybe you were only suggesting this for therapists who are already acting badly?

If the first is true, then you are seeking therapy under false pretenses. You are coming into it with a bias towards finding wrongdoing. Your actions could influence the outcome. For example if you go into this thinking all therapists are monsters you may sway the outcome by your own behavior and the muddy the waters between their real or perceived wrongdoing and your intentional wrongdoing.