[Celerity]

I am waiting for the door-to-door police visits, and subsequent reactions to the signs.

In an unarmed city, there is nothing one can do to protect their property - Nor themselves or their families. Your comment is totally correct.

[Bitsy]

In an unarmed city, there is nothing one can do to protect their property

You could put up a sign, A psycho lives here - not responsible for what happens.