Strangers can be greeted, engaged in conversation, and asked if they need help. People with suspicious behavior should be allowed to enter the sanctuary to worship, but they should also be closely watched. Other ushers and leaders should be alerted to the situation so that if a crisis develops, they'll be ready to react. Church leaders, ushers, staffers, and greeters should receive special training in how to respond to a potentially dangerous situation. Security people could be police officers, retired military personnel, or others who have the ability and stamina to respond to an emergency situation.
Many churches are in stalling electronic security systems to keep their congregations safe.
Southeast Christian Church in Louisville, Kentucky, has one of the best nonobtrusive security plans and technology systems available. A welcome center in the narthex of that church doubles as a soft security barrier. It is equipped with security monitors, two-way communication devices, telephones, and an intercom system. Nonuniformed people who work in the center are trained in how to respond to a crisis. The cameras can be installed in daycare and nursery rooms of a church.