Our downstairs neighbours are being douchy like this... We've recently had the cops called on us for a 'gathering' in the tool shed. Apparently they listened in for 30 minutes, knocked and then laughed when they realized it was two guys drinking beer. We've also had a parking ticket for parking a work truck in the alley.
I don't think they thought it through though because now the work truck parks next to their car and our Jeep goes in the alley.... We try to squeeze them in as tight as possible.