Sometimes, when the drumbeats of intolerance start to send out their messages of hate, couching them in arguments of "it harms families" and "children will be worse off," I wish people would look either to Massachusetts, north to Canada, or to Belgium, the Netherlands, and Spain.
If those countries were looked at, there would be evidence for or against the positions those into banning gay marriage take, on "damaging hetero marriage" or "hurting families." I'm pretty sure that those arguments would fail.
And then those who want to ban gay marriage would have to fall back to what their arguments really are: We just think it's icky, and that they're second-class citizens. I'm sure that the good people of this country, who might fall for the fallacious "fact-based" arguments, would wake up and say, "I may not like it, but I'm not going to write discrimination back into the Constitution, after so much struggle to get rid of it."