But stupid people are still needed to continue the discussion, if everyone is smart then there will be no more discussion. So both are needed.
It's not a good habit to say someone stupid though his posts aren't on topic or meaningless. Maybe he has weakness in English.
Alright our discussion should be for educational purpose. So we do not need any shitposters. Because they will make discussion lengthy and meaningless. Anyway there's no problem about length but when someone will try to learn from the discussion they will feel embarrassed. So we should make this forum a beautiful place of meaningfull discussion.