Honestly, I'm not sure I would waste my time. Remember when he was attending that graduation and there were graduates who walked right past him and refused to shake his hand. I think I'd be among that crowd. Some people are either so deluded it's not worth the effort or they are just plain liars and they aren't worth the effort either. Which group is Bill in? I guess I'd have to put him in both groups. Words would be wasted on him.
I couldn't have said it any better. I think the only time I would talk to him and his missus is if they were behind bars and then I would stand and laugh at them....