On Friday, three mobile billboards appeared near Florida Sen. Marco Rubio’s office in Doral, Florida. Created and installed by the online activist network Avaaz, they read, “Slaughtered in school,” “And still no gun control?” “How come, Marco Rubio?” The format and message of the billboards, following Wednesday’s mass shooting at a high school in the Republican senator’s state, mimics the one put up by Frances McDormand’s character in the Oscar-nominated film Three Billboards Outside Ebbing, Missouri demanding justice for her murdered daughter. In the hours after the shooting, Rubio said that lawmakers should “reserve judgement” and avoid jumping to conclusions about gun laws that could have prevented it.