Very good idea. With scripting support we could build complete theme loaders.
No scroll bars would be a welcome option. As long as I can still scroll with a mouse, I don't need to see the bars. They just take up real estate. Removing then all (horizontal or vertical) would be great - all or nothing option. Though I'm personally most interested in removing the list pane scroll bars.
Ok, looks like I gotta do something about that...