I like James Randi. A former magician who has made it his life's work to be debunk the 'psychic' community. Randi offers one million dollars to anyone who has psychic powers. All they have to do is take a test that proves it....
The test has existed in one form another since 1964. Easy pickings, you would think, for the likes of Uri Geller or maybe Derek Acorah.
The scope of this is quite simple. They ask the applicant which supernatural powers they have, then devise a test, agree it and perform it.
Of course the money remains unclaimed, despite numerous applicants every year.
You can see the documentation, results etc here.
Geller has been around for years. I remember being enthralled by this magic man as a child. If you're of a similar age I'm sure you can remember bringing stopped watches to the tv, and have them restarted. He's irratated me ever since with the persistance that he is genunine. I'd be quite happy to accept that he is genuine, but it seems his powers only work with props he brings to TV show. Or that just before he manages to make a compass move, he can clearly seen putting something on his thumb. And why the hell can't he do some thing useful. Apart from bending spoons (and turning bullshit into gold).
And what of the Spiritualist Mediums providing contact with the afterlife on TV or by private readings. Well they haven't actually been around that long. The Fox sisters in New York State started it in 1848. They admitted to being fakers 30 years later, but by that time there were tens of thousands of practicing Mediums. All using tried and tested techniques. Such as Cold Reading.
Maybe these Mediums do provide a service, I suspect it is illusory. If a grieving widow's pain is soothed by the knowledge that her husband is happy in a world beyond the grave, then who am I to criticise?
But if you believe this is trivial, and that psychics can do no harm, then watch this.