He may of not known, or ever seen the inside of a convertible. Which is why he probally labeled this thread "Dumb convertible question." Even though I think the question has been answered I want to clarify it a bit more. Unlike the hardtop coupes, the convertible stangs have 4 switches instead of two allowing the back quarter windows to roll down.
Another reason why he may of asked such a stupid question is a lot of times I will see people running around with the top down, but the back windows up. This is a no no for any convertible owner. If the top is down, all windows must be down, unless youre temporarily avoiding a badly aimed sprinkler. Anyways, seeing the back windows constantly up raises the question if they actually go down or not. Personally I see no reason why theyre up. If you have a problem with the wind, why the back and not the front?