GrannyGravy since nobody is posting under their own name and no one is saying where they live this thread is no security risk what so ever.
I think we need to ask howselves just how many break-ins actually occur, and despite, having experienced both part or full break ins, I have to say, nobody else we know has ever had a break-in, so they are pretty rare and I think you need to keep a sense of proportion, based on your location and where the exterior doors are.
When we lived in a town, where access to our garden was very easy, we were meticulous about security and had an alarm installed. Now living in a rural low crime village, where access to the garden is not easy, we are very relaxed about locking the doors giving access to the garden. We lock them at night and when we leave the house, but we have a burglar alarm, which we always set when we leave the house, so even if we do forget to lock the garden doors, and someone does get over the high fence and/or locked side gate. If they open a door and walk in, the alarm will go off and we know from when something like this did happen, it brought all the neighbours out, but the attempted intruder had scarpered the moment the alarm sounded.
in of any kind, so they are pretty rare