Day Two Lesson Two
If it's a face to face game, be sure to give your opponent a hardly HELLOOO with a nice gust of wind behind it. Of course, you just ate onions, and be sure to have a few fries hanging out of your mouth at the same time.
With an on line game, instead you have to say hello and mention that you're offering a finger to pull.

Day One Lesson One
When the opponent says ..... Hello I hope you enjoy the game .... then a good response from you would be to say something like..."What do you mean by that?" or "So you decided to stop being mean to everyone?"
Both responses immediately put the opponent on the defensive and second guessing everything, including their chess moves. They are much like a discovered check.
A potential third benefit is that they may be uncomfortable playing against you from that moment forward.
The estimated increase in your rating with using this technique is approximately 50 points?