Didn't want to read through the whole thing, but there are people making rounds at houses and vehicles. They ask about kids, family, dogs, etc. If they knock your door, they will try to push their way in and scope the place out. They look for TV's, etc... If they scope your car, they tend to want to follow you home and will scope you out from there.
Its happened to two people I know and also I was with a friend (female) at her apt when it happened. There were two guys that were extremely pushy and I got to the point of warning them I was armed and reached for my gun and they turned and sprinted off.
Called the police and informed them what up and they said they were aware of alot of this going on.
We are always careful of course, but I never worry about anybody making their way in.
This is just one of our three.