I absolutely agree with you, @jovirkku, but on the other hand this is understandable, that when you reed a comment which is absolutely not polite under the post, where you just posted your own opinion - you will answer this person the same way.
Till now i never had any problems in this Forum (and old tjc) since 2013. The communication was always polite and constructive. No one have abused me or wrote me something what would somehow feel me angry or sad.
I wish me more moderation in certain forums, so anyone can feel comfortable here.