A few decades ago I remember a consultant saying he finished the work so early that he had to pretend he was working for the rest of the paid time. He killed his reputation and demonstrate his dishonesty. Considering we were negotiating hiring him for a consultancy gig he destroyed the possibility of working with the company I was representing. Clients cannot be treated as friends to share confidential information with, especially if you are exposing your unfair behavior. Dishonesty can only harm everybody, but talking about your dishonesty makes you look stupid.