Yes, you're right, PublishJosephNg.
I suffer with this as well. Quite severely. For some reason - and the psychologists have explained to me the reason according to the mental health paradigm - I start going mad and paranoid around strangers - and strangers are everywhere you go. It's a curse I tells you. But to hell with it, I'll get through my life in one piece.
I'm experiencing an improvement as time goes by though, so that's promising.