If the goal is purity of in camera capture, why not shoot full frame and not use DX crop as an "advantage" over those not using it? As the original thread title states; I don't get it.
LIke I said: "Just to clarify: Choosing DX mode in a, for example, D800, BEFORE the shot is not cropping IMO. Cropping in the camera AFTER the shot is the same as cropping at home". If you think it is the same as cropping at home, it is fine by me, but take into account that, in any case, it is a fixed and centered crop, very different from what you do at home.
It is just an opinion as yours; some people think one way and some the other. There is no good or bad, although I perceive some people don´t like to be talked as inferior skilled by cropping etc... It is not that, it is just that some people find more fun and admirable doing it in camera etc... This is a hobby, so everyone should just do it the way they enjoy the most...
Well, so do I!!! But many people find it more fun (and with a better sense of achievement) trying to nail it in camera. Is it really so hard to understand?