The discussions about everybody mistakes should be open, with emphasis on everybody, but leave mockery out of it. Inform everyone when they make mistakes without mocking them or attacking their egos and keep it factual. Don't assume everyone is friend with everybody nor that everybody is happy, it is not true. The line between laughing at it and with me is thin and oftentimes muddled.
Relaxed laughing at mistakes is result of good teamwork, but you don't get to good work by demanding that people accept being laughed at or mocked.
