Sorry, I left out a key word just above. Now, have added it.
The point of the story was that my son and I were perfectly willing to help a somewhat novice (at least to the area) find a productive place to wade fish.
However, our ninja friend didn't want to disclose where he had been fishing.

I recall a thread about this subject a couple years ago. Seems most who posted suggested they would not deceive or keep quiet about productive waters they were aware of. I may be remembering wrong?