There is a Baptist Church in the town I grew up in that quite regularly has stupid or insane shit on their board. (Un)fortunately, I rarely go by there anymore, and it has been so long that I have that I can only remember two gems.
"Don't be so open-minded your brain falls out"
"Islam: America's greatest enemy"
I found the second one to be particularly fascinating/offensive. Despite the fact that I was 15 or 16 and considered myself to be a conservative, my immediate response was something along the lines of, "Wait, what? No, Muslim terrorists don't accurately represent Islam. The problem is people who take their religion too seriously and are willing to kill for it. The problem is radical fundamentalists, like the people of that church."