-Removed-There is a difference between giving people the benefit of the doubt and losing trust in somebody completely.
I gave the example previously of giving money to a lady who came to my door, saying she was a neighbour and that her car had broken down. (Needed money for a taxi to get to an interview). My wife thought I was daft trusting somebody like that, and the person did indeed fail to repay it. - But then and now, I don't want to be a person who instinctively mistrusts people. - That said, if that lady was ever to reappear at my door she would find my trust in her had gone. - Just as it had gone with you.