Dear Koberlein,
I’m quite amused to see the arrows Mr. Crothers now aims at your direction. For some time I was one of his targets, when he was spouting nonsense about black holes and big bang theory. Then he started to report about this Robitaille person. Robitaille had criticized CMB observations, and since Crothers wanted to argue away the CMB for his own purposes, he became an admirer of Robitaille.
For my amusement, I looked at this youtube video where Robitaille lectures about Kirchhoff’s law. It is not difficult to spot the point where his argument goes astray. He doesn’t understand the most basic laws of thermodynamics, and that, if you have a cavity with the same temperature T everywhere, then the radiation intensity inside the cavity will be in equilibrium with that, or, the radiation curve will show the unique black-body distribution corresponding to that temperature, regardless of the material the walls of the cavity are made of. That’s how you derive Kirchhoff’s law, but of course you know that. Robitaille and Crothers don’t. Amazingly, they manage to get followers, but don’t worry, fringe scientists never succeed in making a dent in real science.
G. 't Hooft
https://briankoberlein.com/2014/12/30/tilting-windmills/