So I understand the fear of strangers [and strange I am] but it is quite irrational. A] Given the odds that I am a dangerous guy [especially in a 100 percent Charedi neighborhood and my 100 Charedi look]. B] If I were a criminal then after the door was opened a crack I would push my way in. So if you are really afraid - don't open at all. [Today this happened with a neighbor. I am like - Rebbetzin, if you think I am so scary then don't let your daughters hang out in my house for hours with my daughters....]
The reason this is important is b/c we are Jews and have this ethic of Hachnasas Orchim. So if someone knocks on your door, open it wide and give them a warm greeting 馃榾馃槉馃槃馃槃 . If appropriate - invite them in. But peering at them with a fearful expression with the door opened only a crack gives them the feeling that they are unwanted and viewed as a potential threat. Who wants to feel like they are a threat??
Now - if you live in a "mixed" neighborhood [you catch my drift] - then obviously one must be more wary. So if you look through the peephole and see an einikel of Cham ben Noach [or of Mohammed ben Abd Allah bin Al-Muttalib] who has an angry, menacing look on his face - opening the door might not be the best idea. But if you see a woman with a long skirt and a tichel or a man with a beard and peyos - you really have nothing to worry about. The odds of the person being dangerous are much much less than the odds of you having a car accident every time you get into a car. So if you drive and take the risk - you can take this "risk".
I often think about this in airports when they are cross examining me. I mean - in the history of the world, has there ever been a terrorist who looked remotely like me?? For crying out loud - no I didn't pack myself. I begged my wife to do it b/c I despise packing and when I was a kid my mommy did it for me. Why are you asking me such personal questions?? Or I see a family of nine from Lakewood or Flatbush painstakingly going through customs. I mean - do you really think they are blowing up the airplane or are planning to take it hostage and force the pilot to land in Syria??? I understand that they can't pick and choose who they examine and check their luggage. It has to be uniform. Racial profiling is more 讞诪讜专 than the 注砖专转 讛讚讘专讜转. But you can go a little easy on the people whose odds of being terrorists are much less than the odds of them being Martians from outer space.
We all know what the terrorists look like....