One of my neighbors stole a package from my doorstep once. The packaging with my name on it was hanging out of their rubbish bin when they put their bins out for collection. One night I picked the lock to their front door and took all their food and booze then went home and had a feast.
The first one says "dear neighbors" to indicate that perhaps they don't know exactly who it is. How do you confront someone when you don't know who they are?