Frustrated by the fact that Facebook allows users to "like" something, but provides no way to offer an opposing opinion? If so, you're not alone. More than 3 million people have signed an online petition asking for a "dislike" button on the social networking service. And now, two guys at the University of Texas at Dallas have created a Facebook plug-in called EnemyGraph that allows you share the people and things you despise with the world.

Dean Terry, director of the emerging-media program at the school, and a student named Bradley Griffith have created a program which allows users to actually declare enemies. "We're using 'enemy' in the same loose way that Facebook uses 'friends,'" Terry said. "It really just means something you have an issue with."

According to Terry, he would have preferred to create actual "dislike" functionality, but Facebook prevents developers from doing so because, some critics say, they don't want to run the risk of upsetting advertisers. In fact, Terry pointed out, it's a miracle that the plug-in even passed Facebook's approval process, although he suspects the company will prohibit its use if it grows in popularity.

According to Terry, the app strives to create nothing less than a form of social protest. "It's social-media blasphemy, in that we're suggesting that you share differences you have with people and share things that you don't like instead of what you do like," he said. "I think social media needs some disruption."

Go here to start using EnemyGraph. Who will you add?