Saigon home security

No one seems to have alarms on their homes here. Instead they have
dogs. If they don't have dogs they have lots of barbed wire. And if
they have on or both they still have a huge metal gate with spikes at
the top and a complex lock inside the gate that can only be accessed
by a small hole. This photo is of a neighboring house. Why such
measures? What about the cops? Seems no one trusts the cops here and
if they do come by it's to get money (if you're a foreigner or making
any money out of your home shop).