I've said elsewhere that what I do in this situation depends on the feeling I'm getting at that moment. IF I feel that my food will come back improved, I will send it back. IF I fell that the waiter/chef or anyone in between will resent my appeal, I will just ask them to remove it, and remove it from the check. IF it's really not too bad, I will tell the manager so improvements can be made in the future, but continue to eat it. And I do believe I am one of the ones who has told about witnessing a spit or wipe plate. Also, there are several reasons people don't bring it up at the table. Making their companions uncomfortable being one. For some people, they're only comfortable at home, at a desk.