Your not in the real world. Your next new neighbour could be nutters (like happen in Queensland when a helpful neighbour and police were shoot dead in an ambush situation) Police are sworn in, trained and armed and do their best. In the very very rare situation that an officer did the wrong thing they are investigated and they also wear body worn cameras that assist in investigations. I reckon they don't get enough of the grubs. Its a big decision to shoot and creates post incident trauma, I believe many would rather have not pulled the trigger; however they step up and do the task at hand. There are many grubs that attach and assault Ambos, paramedics, nurses and doctors that need sorting as well.