Is it worth reminding people of the rule:
"The only form of editing allowed is simple retouching"
or can this be suspended for this week only?
To be honest I'm against relaxing rules that allow 'enhancements', it would disadvantage us luddites who haven't got the foggiest about things like that.
You don't need photoshop or that bloody instagram thing to be "arty". Just learn how to use the aperture, shutter speed, framing and exposure. Just like we always did before digital came along.