It's wrong to start confrontations with people you live near.
Bob's neighbor's dog pooped in Bob's yard and Bob had to clean it himself.
Bob wants to send a message to his neighbor.
Bob knocks on his neighbor's door and asks about the dog poo.
Bob hides his neighbor's lawn gnome in revenge for the poo.
Bob's neighbor apologizes, promises it won't happen again, and reprimands his dog.
Bob's neighbor then knocks over Bob's grill, in turn Bob throws rocks in neighbor's pool, and in turn...