But some people will be doing mistakes intentionally to irritate others and see the fun. We can easily identify such persons. We should not spare such people and we should expose theim by highlighting their mistakes when they are in a group.
Generally, in offices the bosses will call the employee separately and inform him about the areas where he has to improve. But if the response from the employee is not positive then the boss may shout on him openly.
Thoughts exchanged is knowledge gained.
Some of the senior officers are very rude to their juniors and subordinates. They shout at them unnecessary before other employees. Perhaps they want to show other employees that they may also face same humiliation if such mistakes are committed by them too.
Knowledge is power.