If you’re designing for a Trent Reznor project, Fuel Collective’s ImageGlitch literally achieves the task by having users delete lines of code from the image’s code makeup. A glitchy app will have glitch results: you can’t just delete any line of code, but some fidgeting in the text editor allows you to suddenly edit out lines, alter color, and completely screw up any of those vintage family photos you’ve saved to your hard drive. I don’t know how safe this is, but it’s recommend that you back up anything before you start deleting data from those image files. I might try it to create some new graphics for a site I’m working on, but I think Fuel Collective has already beaten’ me to the punch.
Download the destructive image editor in the Mac App Store for $.99.