@stapo49 the ability to digitally manipulate an image has expanded beyond anything capable of capturing in camera. You mention sky replacement, but is that really bad? Say one day you capture a gorgeous sky at the beach, but the water isn't right, and another day you get a tremendous rolling surf but the sky is bland, they're still both your images, so why wouldn't you combine them into your vision? I have a file of nothing but sky shots, various textures and other scenes for backgrounds. Personally I see nothing wrong with using them when needed, but that's me. Photography is first an foremost an artististic expression of the photographer, so visions, opinions and tastes are going to differ. I do believe that digital editing can lead to a photographer not taking enough time on setting up the shot, thinking they can always fix it post. To me that mind set is creating unnecessary work.
When it comes to marketing, digital manipulation has gotten so bad that ongoing discussions have/are taking place, and even laws are being put in place for "Truth in Photography". Where do you stop with editing, is it okay to, smooth the skin, change eye color, slim the waist and thighs, what about extending the neck, basically dissecting and reassembling the model in a "perfect", alibiet unrealistic form. Me personally, when I look at a photograph in a magazine I see and comprehend the editing done to the model, and it's not likely that I'd "envision" myself looking that way even if I used the product being sold, nor would I have any negative feelings about myself for not conforming to the "perfect" model, but there is a fear that some might. Really truth in advertising is not something new, it's been tossed around, cussed and discussed, since the beginning of time, gullibility isn't something new. As P.T. Barnum is quoted saying, "There's a sucker born every minute"