Or gangsters. We had a bird feeder, which we occasionally let run dry. A cockatoo got pissed with this, and concocted a scheme. When the feeder was empty he sat on the outside fridge and screeched. Once he got your attention, he made sure he was in full view and started destroying things . He only stopped when you put out more feed.

Amused by this I mentioned it at a neighborhood BBQ, and was greeted by a chorus of "oh yes, that happens at my place too". The guy holding the BBQ held up his BBQ tools and said: "See, brand new, this is the 3rd set". It was a neighborhood wide protection racket run by one bird.