As Harry says, dark-room manipulation has always been practised. Its great when the weather and light are perfect, the sun is behind you and there are no extraneous artifacts messing an otherwise beautiful image and then, yes I would post it ex camera. Mostly however at least one parameter is against one and those of us with cheaper cameras suffer from erratic bias there too. Lastly I find the web-site software does some fading which often needs compensation.

If processing or manipulation is over-done or badly done, it usually shows and is counter-productive anyway