The only reason I want to remove the bottom pane of glass is to avoid it being broken after I've built a wall behind it. Wouldn't help with the top pane, I know. But why tempt fate?
Now to totally contradict myself... I've also been toying with the idea of doing some kind of fake "stained-glass" on the windows that I don't want using a gel I'd seen in the local art store.
Unfortunately, the windows just aren't quite the right size. I would have to remove the entire window, build my "fake", hinge it at the top, and prop it open like a shutter when I wanted fresh air.
The benefits = it would be pretty and would let in light without compromising privacy. I also like the idea of adding a foam plug to it during the heat of summer and propping them open for additional shade.
The disadvantage = that's a hell of a lot of fabrication that would take more time than I have.
But it's fun to dream up weird stuff.