Know a few guys who get lost in a crowd easily.....slim build, pan face with no expression and seem to just disappear unless your lookin' for them......seems that might be a better persona than the BG look...Idunno.
Oh by the way one of those fellas years ago did some Gov't work on the European Continent.....gess he was good at blending in.
Hmmmm, I'm the person strangers pick to ask for help....My long beard and shaggy haircut don't seem to put them off, it might be my hat
People trust someone wearing a hat
Just be yourself. Trying to be like this or look like that is what middle school and high school kids do.