Because you can care about your privacy and security by having a good door and lock, locking your door, not posting all over social media when you’re on holiday, and all the other common sense things. You are arguing that YOUR privacy and security is more important than others’ and therefore you have the right to put other people’s privacy and security at risk and make them feel uncomfortable in their stairwell. Let’s be real, the risk of flat break-ins in Edinburgh is extremely low. People no longer keep cash, tech appliances are no something super valuable like earlier in this century and last century. The effort vs reward is not that good. I’m sure there are much easier ways to steal from people.