I hide the world, then let it through, With just a pull, I change the view. On stage or window, I may fall, what am I, soft divider for all?

Fast and high, I’m a swift little fellow Painful to do when your throat is not mellow

I'm used to build a dragon's hide, Or to give an idea of size, Lady Justice holds me high, I'm the ascension notes go by

Beer before liquor, you've never been sicker; liquor before beer, you're in the clear. This poison has been drinkable for many ages; it's legal most places, while weed is considered dirty. Prohibition once tried to disturb me; the U.S. government poisoned its people to try and deter me.

When walls said, keep out, I took offense. I answered back in the airborne sense.