Easy to be wise after the event. Following publicity about lock bumping I guess lots of people deadlock their front doors at night. Having done which they will think it sensible to leave keys near the door so they can get out if they need to. The fear of being unable to get out in a fire might be greater than thoughts of 'scroats' getting the keys by whatever means. Must admit that the idea of people breaking in (rather than fishing through the letterbox) simply to get the car keys is't one that I had thought much about.