I can't get enough of Errol Morris's blog posts... this one includes a great segment about Ansel Adams "removing" whitewashed letters on the mountainside seen in “Winter Sunrise, Sierra Nevada, from Lone Pine, California." Is dodging and burning a kind of fakery? Dust removal? And does it matter if the image isn't being presented as a geological survey?
I think it's all a sort of fakery, the photographer is charge of showing what they want to put out there, and even the subtlest manipulation of color, contrast and clean up is a sort of manipulation.