Drawing
Painting
Watercolor
Oil Painting
Photograph
Tin Type
Film Photograph
Digital Photo
In the above list we all have a quite clear idea if what some of those things are, and as you move down the list it gets foggy, that is the problem, not how people are making images, but how present language handles defining them.
We have had in some cases thousands of years to define some of these things and but a handful of years to define others. Until language catches up this battle will rage on, I would like to propose that we start calling images burned onto an emulsion with light Photographs, and images captured electronically Photos, if you change an image it should probably be called a HDR Photo, or a Digital Image depending on how it was edited.
As for are these people cheating somehow, I see it as using the tools available to produce what they want the viewer to see. This altering of images is done in all forms of image based art, that is what you are trying to do whenever you take a photograph and bring it into a form for viewing. Unless you are trying to document something as it truly is you are altering the image somehow, be it with lighting, angle, depth of field, or zoom, you alter reality all the time with the tools you have available to you.
Lets define these things so we can understand what they are, not complain about them.