Like other physical security measures (tall fences, razor wire, bars on windows, steel doors) it’s a sign that you are in a low-trust, high-crime environment.

Like other physical security measures (tall fences, razor wire, bars on windows, steel doors) it’s a sign that you are in a low-trust, high-crime environment. If in fact you are, then those things are important, but most Americans don’t want to think of their local communities this way and resent developments that reify such a perception. Especially when it comes to children. We really don’t like young children being cognizant of evils and threats and other such “adult” concerns. Innocence is important.