The problem is how to do this ?

quite easily by being a bit more reserved, not always persisting in your individual point-of-view, letting '5' being an even number from time to time. It's not a question of html programming but of individual character. If someone is in agrressive mood, even the most sophisticated 'button' will not help to keep the forum free of accuses, offendings and humiliations.

Well, a very nice thread (at least to me) had to be closed, because a beginner was told by someone, that his question was not relevant enough.

And it was relevant, believe me!

Kai