I know I have mentioned this before but I recall going into the underground in London while on vacation. There was a guy wrapped in a sleeping bag on one of the landings, He had a distinctive hat out in front of him and had longish blond hair.
A few hours later when we returned through the station there was a different guy there wrapped in the same sleeping bag with the same distinctive hat in front of him but short, dark hair.
I noticed that and as I was going to say something to my wife about it my son leaned in and asked if I had noticed that was not the same guy there in the morning.
I guess there was a shift change during the time we were away..
I am sure there are scammers out there just as I am sure there are people who are truly in need. It is a shame it is so difficult to tell one from the other.