No such thing as a "gimme". Just like there are no "mulligans" in WGT.
If someone has an expectation of a concede, they should be angry at
themselves if they don't get it for trying to impose their expectations/values on someone else.
That's similar to going to a restaurant, getting terrible service and the waiter still having an expectation of a good tip. NOT!
I concede when I feel like it. Which is to say, for example, not too often on Oak or Kiawah. Those greens are killer and if you don't know the nuances of the tricky ones, they can change the direction of a game.
Just putt it out and shut up. (no offense)
Allen