Now I only post my images on NPN - it has a massive audience, some of the best nature photographers and always provokes lively debate.
I'm not going to name names here, but one very well respected wildife tog (IMO the best we have in the country at the moment), made some sweeping and pointed comments re cropping, baiting, stacking, HDR etc.,.
Now re cropping, I've done it, if cropping has let me get that lovely shot of a subject that was just out of reach, then I've taken advantage - along with the other tools in PS that allow all images to be manipulated to a larger or lesser extent.
I do think though that cropping is something that most newer togs will grow out I hope, of as their skills develop - that's my experience in any event.
Minor comp adjustments aside, there is nothing to beat that feeling of getting that full frame image onto your PC, and knowing that you've nailed it !
A question for you - is this a crop of FF ?