I understate your policy and i'm OK with that.
But seems like it is me also, because i'm new here.
Question is how can you get off your house then? There is so many new people on the street, there is so many suspicious people there too. How can you drive a car? There are so many suspicious new drivers there too.
Don't take me wrong, i'm not trying to offend you or make you mad. Just making point that not all people are the same. Yes there is no way to tell who is who, but I trust everybody to the point where they show me that they not trustworthy.
Cheers.