There was just a report on the news about a guy in detroit fed up with a crimnal paiting grafetti and breaking windoews and a abandon building next to a guys buisness. He couldn't getthe police to respond so he took a shot atthe guy with a crossbow. He missed, but he was so casual about it on the news, then mentions "I feared he had a gun" the reporter just kinda smirked like he knew.
I personally think this is the way to deter crime. The people need to stand up for the block and make the criminals afraid.