Re: Now what do you do
I know someone who lives in a high crime part of London and has a door with massive bolts and locks and a complicated alarm system.
I dare not tell them, but I have worked out at least two different and easy ways of burgling the house and being gone long before anybody could make it from the local police station. One of them would not set the alarm off.
Really in the 21st century the most reliable and not too illegal system would be one that was able to make a small hole in a burglar and extract a DNA sample.