In Hungary, in the 1990s there was an extremely profitable enterprise known as the Witches' Association.
It was comprised of neopagan rockers, drunkards and metalheads, and old cat ladies who like to do fortune telling as a hobby. Their business plan was really simple. They'd go into a small village, and find the richest, most garishly decorated house - usually owned by a local gypsy crime lord or something similar.
They'd ring the doorbell, and tell the people living there that they are from the Witches' Association, and driving by they saw a huge, dark curse above the house. But, of course, being the benevolent crowd they are, they are willing to remove it right there and then, for a mere million Forints (approx. $5000).
Usually, they got their money. And they didn't even have thermal cameras.