Congregations seeking to transform realize the world is in an era where unusual things need to be done to address security issues. It is not that the typical congregation is in any real danger of violence occurring at their church. It is that societal fear creates an expectation of church facilities being safe places.
Does this mean that every congregation needs an armed guard? No, that is situational. It is that every congregation seeking to reach households with children under 18 years old needs to show how they are reasonably addressing security issues in a way that help people feel safe.