@everyone. Good morning, good afternoon or good evening to everybody, my dear friends. I am not harmful. I promise I'll try to respect all rules (and think before creating a question etc.). The last time I was here was about ten years ago; I decided to return. I'd like just to discuss some rules of our beautiful site: what is good and what is bad, what are the basic rules of good questions. I'll respect everyone's opinion and I won't slander.