Anyway, similar papers exist. My personal favorite was written by the Iowa State Supreme Court as their ruling in Varnum v. Brien, which is why gay marriage is now legal in Iowa (and will continue to be legal for the foreseeable future). They go through the list of secular reasons that people claim are why they oppose gay marriage -- marriage is for making babies, marriage costs money to the state, etc. -- and debunk each one of them thoroughly. Then they say, essentially, "Gosh, those were weak arguments. Probably the real reason people are against it is religious reasons. Now gather 'round, children, because we're going to patiently explain separation of church and state, and the distinction between civil marriage and the various religious marriage traditions." It's a solidly compelling argument for why gay marriage should be legal. Plus, the ruling was unanimous, which is a plus.

And yet, you can show that explanation to as many bigots as you like and it won't do a damn thing, because bigotry usually isn't something you can reason people out of. What we need aren't reasoned arguments; we need propaganda. Here's my idea: laugh at bigots. Laugh at their old-fashioned superstitious silliness. Laugh at them as if they were wearing funny hats and shouting about witchcraft. It's not kind, and I feel a bit dirty for advocating this, but it's a lot more effective than trying to argue with them.

The way I could see this paper being effective is if it offered an easy-to-reference list of every common argument and the standard rebuttal to it, sort of like Talk Origins. That could be valuable.