But seriously though folks....
Obviously the guy is barking mad, but dangerously so. If he manages to persuade some poor sod to use his silly 'cure' instead of having chemo then they will die.Yes, they may well die anyway, but that's not the point. And never mind about the benefits of offering them 'hope'. There are a variety of legal offences for people who knowingly cause, or attempt to cause, harm and death to other people.
It all sounds rather silly, and no more than a minor pain in the bum for big G who will have to waste time and money telling him to go and practice auto-fornication, but serious action needs to be taken to stop these charlatans before they kill someone.
I think he should have his day in court, but as the accused, followed by several years in a nice warm cell where he can chat to his preferred sky-pilot.