Yeah I just came across it because we were playing with dry ice, with the kid and the subject of Mr. Wizard came up.
I always enjoyed those shows. He always seemed like a decent guy, but you never really know anyone you haven't actually met in person. Maybe he is a dick, but I doubt that very, very much.
Anyone remember this faggot called The Frugal Gourmet who was abusing his young male assistant? http://current.org/1998/07/cooking-star-pays-plaintiffs-in-sexual-abuse-suits/
What I think is interesting is there was someone out there that noticed this happen a few times and thought it would be funny to make a video about it. They then proceed to go through tons of episodes (I didn't know this series had a box set) just to find instances where he was being a dick. As they are watching every episode and find him say something dicky they copy those sections. Once they have dozens and dozens of examples they then edit them all together. To think the amount of hours someone spent making this for Youtube is mind boggling.