There really is no righteous way to do a devilish thing. This could be a “let them go to hell on their own” decision. The events get a bad rap for going so over the top they physically injure people, people won’t visit any more. Problem solves itself.
I’ve heard some people get very scared in these places.
I heard of one place which had porta potties set up at the front, and told people going in that they should go to the bathroom before they enter.
I’ve heard people tell stories of smelling urine in the haunted house, from people who lost control they were so scared. Just saying, you better really enjoy being scared to death if you want to go in those places.
Unless he's suing over a trip hazard (you know, like the busty bad actress in the horror movies) I can't see where he gets off saying the Haunted House crew injured him.
He ran, he fell down, he hurt his wrist.