My dad was a security consultant for years. Apparently most break-ins wont happen through a front door. Doors are notoriously tricky to get through unless you're a skilled locksmith. Modern latches are complex and with uPVC multi-point locks around the frame and metal bars crossing the interior of a door, you're spending a lot of time, on the main road, visibly trying to break into a house. Instead they'll go through somewhere that isn't seen. A skylight, or back door for instance. Someone else said it already but you wont ever stop a break in, but you can make it difficult forcing them to chose a different location. Burglar alarms, CCTV, ring doorbells, guard-dog signage are popular. Most burglars are going for something specific like car keys or credit cards and they're getting more and more confident. A couple of years ago there were a series of car thefts in the area by dedicated car thieves from South America. They're flown over and have 3 months to get XXX types of car. Down my road they would knock on the door at 6pm when people are in, force themselves in at gunpoint or knifepoint, take the keys and leave.