Well... in this case the grilles did stop them
Just in case it gets you overly worried, there are always reasons why certain houses are targetted. In this case it is because his house is next to the hills at a remote corner. But you are right.. these buggers totally do not consider the existence of "police" or "law and order". For your case, the vulnerable period is at the initial handover stage when occupants have not moved in.
Secure your house with very strong grilles and good alarm system, stay vigilant but not paranoid.
Thanx Lemans, now that you mention this, I feel abit better now....
Thats one of the reasons (other than cost) why my malaysian wife insisted on an intermediate unit...
I will definitely move in when the precinct is 80-90% occupied....
Thank you!!