Hi Vladimir, it may be bad practice and bad manners, but there is nothing unethical about this.
Have you never been angry about posted materials and wanted to rebut it in a strong language?
I know I have.
We are scientists but we are also human. We get angry, frustrated and we usually vent our displeasure among colleagues and friends.
In this age of instant communication, it is easy to forget that you are addressing ~10 million scientists on RG when you are upset about something.
So I am offering a compromise. I delete my posts on this thread. You and Mahmoud delete your posts so Clifford can delete the question and learn a lesson.