We live in an apartment building, really good locks on the outside access doors. Nobody has succeeded in breaking in during the 16 years we've been there, although the underground parking was broken into a few times several years ago (once by someone driving right through the gate). They couldn't get from the parking area into the building, though. There's also "block watch" in the area, which means that households where people are home most of the day look out for unusual activities (they call police if they see anything), and put a special sign in their windows so that any kids in trouble can knock at their doors and find help immediately. Our building is full of seniors, so neighbours watch out for them and check on them. So far, so good.
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God grant me a good sword and no use for it. -- Polish proverb