This happened a long time ago. We moved into a new apartment and encountered the neighbour from hell. He threatened to call the police on my 11 year old son and his friend for sitting on the low wall outside the block, he made nasty remarks to our children whenever he saw them in the street, he photographed them from his balcony etc etc. He was well known in the area for his obnoxious behaviour. At that time, none of this was specifically illegal. This man was one of the most spiteful poisonous individuals I ever met. My husband confronted him a few times but he ran inside and closed his door (a coward too). One day my husband had had enough, went to the local hardware shop and bought several tubes of industrial strength glue. At 2am when the street was quiet, my husband went downstairs and glued his garage door to the concrete driveway. We got up early next morning to watch the fun when he tried to open his garage door and waved to him when he heard our laughter and looked up at our balcony. He knew who did it but couldn’t prove it. He stopped harassing our kids and avoided us until we moved out. It is impossible to describe how deeply satisfying this was, we laughed about it for years.