Fight or flight. Some people run while others don't. You can run all you want and assume they are drunks I have seen the darker side of humanity and will not assume the person doesn't mean harm. Hindsight it's easy to say oh he was just a drunk having a bad day. But when it's 2am and they break a window to open the door, my first thought isn't "this guy must be drunk"
So rely on other people to help. Ever hear of the story of Kitty Genovese? Dozens of people either saw her getting stabbed or heard her screams and nobody intervened or called the cops. Thanks, but no thanks.