When breaking into a facility, the gate is always the weakest point. In medieval times, armies trying to break into a castle would have to focus their efforts on breaking through the main castle gate. Technologies have changed, but the gate remains the point that primarily determines whether intruders can succeed at breaking in.
Unfortunately, many facilities are lax with gate security. The most significant gate security issue stems from facilities using 4-digit pins that provide easy access for criminals. Therefore, it is important for people who are responsible for gated community security to understand why 4-digit codes are a serious problem.