I onced lived in a gated community in Palm Beach Gardens. It had a guard at the gate checking if you were a resident or had someother business being there. Did I feel secure? Yes, until my townhouse was broken into and we were robbed. By whom? Well, probably by the crew of groundskeepers or by the property manager who had a key and let in the pesticide sprayers every month.
Regardless of who, they were probably inside the gates for a legit reason and pulled off a few jobs just for kicks.