I think part of the problem is that the LDS people are just so darn nice and trusting.
Then too, they have been taught to judge situations with their feelings rather than their heads.
The combination makes them easy pickings for scam artists.
DUH!
That's a GIVEN; being MORMONs already!
We used to live in Los Gatos California. Back then I was still slightly involved. In that upscale ward there were two major hucksters that really took a couple of older women for a great deal of money. One of them became the bishop. I heard later that he had been excommunicated for something or other.
The other was a closet polygamist. Mankind is imperfect but the church is trooooo.