If he's as good as he thinks he is, some people might not have any choice but to consult him.
Yes, they can be incredibly hateful. And some of them will take their harm out physically. But because they're so full of vitriol, it's easier to avoid them because they announce their presence like a proud elephant.
You shouldn't have to know how to talk to them. You simply indulge their fantasies of control and if you break the rules just right... Well, there have been plenty of instances of outright murder with men like that.