A self-described Apple user, presumably fed up with the smug superiority of "Mac," the hipster mascot featured in the ubiquitous "Get a Mac" commercials, is targeting OS X enthusiast sites with defacements that accuse them of excessive fanboyism. A person going by the name Malcor claims to have tagged at least four Mac blogs with graphics that cast the Cupertino company in a less-than-favorable light.