This used to be quite the hot topic in photography and to some degree it still is.
Like that age old comment "But it isn´t real" , "well, Duh!". :D
As a photographer I like to play with real in my images, sometimes I push my images further than what is real and other times I relish in the challenge of making it as close to as I saw it as I can.
And for those non-photographers out there, no image, no matter what camera you have comes out 100% real without touching up the image a little.
Personally I think most issues arise when an image that is so clearly not reflecting reality is claimed to be so, often strenuously and that actually