These hilarious computer dialog box street art pieces are by Jilly Ballistic, an artist and rebel who delights in showing advertisers the errors of their ways.
The clever statements blend so perfectly with the original piece that they almost seem like one of those unintentional Photoshop menu slips you see on fail blogs, and they're so perfectly pointed that any advertiser with a sense of humor will think twice before taking them down!
Link --via Reddit