Maybe the OP come from some place where no one even locks the door. Some (or maybe quite a few) people where I live don't, and certainly doesn't seem to be the thing to do in my recent trip east. I, OTH, come from an rea (long time ago) here doors are not only triple or quadruple locked but a sliding/accordion lockable metal gate is used in addition to window bars. I heard from a former neighbour that the person he bought his former house from (who was from my home region) had window bars installed in all the ground level/accessible windows.