@jb @KarlDahl One thought is a neighborhood watch, but one that scales/interacts with other watches. A more casual idea I've had is forming a group that practices disaster situations where once a month/quarter we would practice briefly monitoring who was coming and going in town, under the theory of immediate security in case of a natural disaster (or chimp-out). Two important ideas are that the organization cannot be explicitly militant (in my above examples military-type training can be encouraged for individuals but the group should not play a part) and there should be no membership rolls of any kind.