Otis if you didn't advertise it so happily to the people on these forums I wouldn't have a problem with it - its the fact that you seem proud that you're into that stuff that really gets to me because it indicates that you truly don't think its wrong.
Who cares if he does? That would be his problem. Nothing you say will make him think it's wrong. And besides, he said it was wrong already and he's doing it purely for the satisfaction of teaching. Why do you think there are teachers in the world. If he's good at it, more power to him. And if you're right about him, Blockland's fame, or infamy, will skyrocket.