Clicktivism: Meaningless

As SCOTUS debates the constitutionality of Proposition 8 and DOMA this week, Facebook users all over the nation have become part of a burgeoning social media trend. Supporters of marriage equality have been changing their profile pictures to the icon on the left, a version of the Human Rights Campaign logo designed specifically to indicate support for same-sex marriage rights. 
Although many people have said that it’s been personally meaningful to sign onto Facebook and see a screen full of red avatars, many have criticized the trend for being a silly way of “showing support” without actually accomplishing anything significant...

Scientific American. 

Still, if you're really committed to meaningless self-serving gestures, you could always click on an e-petition.
Or buy a crappy 'Legalize Gay' t-shirt from American Apparel, that'll show the bastards!