I'll look into it. I got two super cheap solutions for delivery today. I will look into better options too. It's my hope just installing some will be enough of a deterrent.
It will more than likely escalate it because "you are invading their privacy". I would try to talk to them when they aren't in tirade. Maybe earlier morning when they aren't drunk or high. Offer amends with cookies or others. If that don't work the get some 911 calls in the books that she is the nuisance neighbor and start carrying pepper spray.