In general I'm with you at the moment Jim.
I think some are concerned that newbies may get the wrong impression and think that the focus of any particular challenge is the only "right" or "true" way, with the danger that that thinking might lead them astray.
We can only hope that most people will spend time really learning the program through the whole variety of resources here and elsewhere as well as spend the time doing it, really listening to their own body's responses and tweaking it appropriately for them.
I have seen some challenges that seem overly strict and nit-picky to me, or at least at times the feedback during them does, so I ignore them and do my own thing. But I think that some newer people, perhaps with insecurities, take things somewhat personally and get hooked in so to speak with the "authority" they grant to the "challenger" and an unhealthy dynamic can result.
I agree that people here are generally trying to be helpful, in their own ways. But everyone's way is different, and some rub some people the wrong "way"!
In that case, my advice would always be for the person involved to take themselves back to the source material as it is all there...in the free program on this site, in the newsletters and recipes, in the books and lectures.
Maybe we could use a sticky about this and challenges?