Apparently it’ll cost you quite a substantial amount of money in the UK to be wrong about the specific mechanism a charlatan uses to scam vulnerable people out of their money. From the Guardian:
The Daily Mail has apologised and agreed to pay £125,000 in libel damages to a TV psychic it falsely accused of using a hidden earpiece to scam a theatre audience.
The article claimed that [Sally Morgan] had used a hidden earpiece during her performance in order to receive instructions and relay them on stage as if they were messages from the spiritual world.
I won’t go so far as to say I’m on the Daily Mail’s side — I’m sure they’ve done vastly more damage in the field of professional lying than Morgan could ever hope to — but they were particularly out of character by being in the right in this case. Hopefully the whole thing cost a fortune and the vast majority of the money will go to lawyers
Addendum: “Should I read the Daily Mail?”