RE: Re: noisy neighbors, what to do?
just got done reading this... any update? 
I too have resorted to the placement of big speakers on the offending wall/floor... seems to work especially watching something like armageddon, turn the subwoofer way up so everything in the apartment rattles.
But if you REALLY want to have some fun go to www.thinkgeek.com they have a device that's pretty cheep that takes a 9v battery, if you can get it into their air ducts some how, it will go off at random intervals with a chirp... and they will go nuts trying to find it.
I suspect they don't answer the door because they are stoned. I personally would call the cops saying you smell pot smoke coming from the apartment the other day (can't prove you didn't) If they think there may be drug related activity in there they may handle it a little more aggresively.
You could also fake a ticket and stick it in their door.
"Maybe in order to understand mankind, we have to look at the word itself: "Mankind". Basically, it's made up of two separate words - "mank" and "ind". What do these words mean ? It's a mystery, and that's why so is mankind." ~ Jack Handey