That's true ... but a thread set up on the basic premise that you show both the shot and how it was set up absolutely cries out for comment and discussion. Otherwise ... what's the point of it?
I think, if you submit to this thread, you should expect comment ... constructively and politely given, of course, but not necessarily universally positive.
If a posting is in "JUST KIDS 20##... Let's see them grow and learn", it's a different matter. Unless you have something nice to say about an image of someone's son or granddaughter, perhaps just keep it to yourself!
I hear what your saying. To that end, I don't see this thread as a place to offer unsolicited critique. Complements such as "Nice set up or cool shot" are another thing. I see this as a thread as a place someone can show their set up and final result. Wait....that's exactly the title of the thread! 
In fact there's a whole "Critique corner" in the "photography talk by Genre" sub-forum.



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