Imagine you’re a burglar. You’ve decided to tackle a high-end luxury apartment, the kind of building with multiple Picassos in the penthouse. You could spend weeks casing the place, studying every resident’s schedule, analyzing the lock on every door. You could dig through trash for hints about which units have alarms, run through every permutation of what the codes might be. That’s one way to do it. You could also just steal the super’s keys.