If you are wondering what the "Red Equal Sign" you are seeing in place of so many facebook profile pictures is all about, here is what Askmefast.com is saying:

Many marriage equality activists have camped outside for days ahead of Tuesday’s Supreme Court hearing regarding Prop 8, and those who could not be on site in Washington D.C. have taken to Facebook by posting a photo of a red equal sign.  The photo originated from the Human Rights Campaign’s red equal sign to signify their support as the hearings begin. In fact, Human Rights Campaign is urging all Facebook users who support gay marriage to change their profile pictures and avatars to the red equal sign photo.