The folks at Dove, as part of its "Natural Beauty" campaign, are taking their anti-Photoshop efforts straight to the enemy, and their computers. Their team at Ogilvy created an easily accessible app for artists and others that's billed as adding a healthy-looking skin glow effect to the photo. But in fact, it undoes any 'shop effects. While not a true guerrilla offensive — the effects of the undo-app can themselves be easily undone — anything that gives Photoshop abusers pause is OK by me.