
My ex neighbours were always doing this, no matter what I said I was going to do you can guarantee they would then do. I got so fed up with this that I told them I was having my house decorated while I was away (purple emulsion and lime green gloss in the hallway) - the idea being I'd have changed my mind but forgotten to say anything to them. You can imagine my surprise (!) when I saw them a few weeks later and saw they'd painted their hallway those exact same colours.
It was tiresome, irritating and on occasion downright creepy but luckily it never became anymore than that. I should add my neighbours weren't all there and I'm not entirely sure they were actually capable of having an independent thought.