Try to start with small things, like writing your comment but not sending it. You'll see it is really easier to not send a written comment then to not write it.

Try to start with small things, like writing your comment but not sending it. You'll see it is really easier to not send a written comment then to not write it. After a while you'll see that you don't need to write your comments, but if you cannot resist you will be able to return to a practice of writing but not sending.