Rock-N-Roll Hall of Fame

Taken while sailing through Cleveland, Ohio last summer. It had every artist since the beginning of rock...except my favorite ( Van Morrison). I know he was inducted, but chose not to attend his induction ceremony. That's Vans way of things. But my question is...did they black ball him because of this? By all accounts he should be represented with a "display" like all the rest, but I did not find it. Color me disappointed.