It sucks and it's not fair, but people who advance themselves at the misfortune of others has existed since humanity.

Like you can have a credit card company give you a call, "We see a flagged charge for $5,000 to the Church of Scientology," but if the person on the other end says, "No, that's not fraudulent," what more can be done.

Would it have been possible to legally stop those hostile elements before they targeted your father?