These tales used to annoy me to the nth degree....so if you weren't a dub you'd be a crook is what they're saying.
When I was very young I had a part time job in a department store...they had hired another girl who was a witness I did not personally know. Well boss comes to me asking about her because they had ample proof that she stashed a bag of clothes and made off with it ...she got canned for the theft. So...being a witness does not equate with honesty in reality.