Of course I'm not happy when I lose but I really don't have the feeling that I should prevent someone from having the satisfaction of beating me and boosting their confidence.
I mean, seriously, what kind of attitude is that?
Last time at the Club a guy beat me up pretty brutally. And that while he had 5 minutes for his moves while I had 10. I think he played really good and so it's a well deserved accomplishment for him.
For me it doesn't mean I suffer, it simply means I need more practice.
Will he think he's better than me? Of course! And guess what, that's mainly because he actually is!
When I'm playing people online and they're losing, they often just let the timer run down rather than resign, or leave the game without resigning. I get this reaction at least half the time I win against people.
This seems to show that the negative emotion of anger is far more common in chess than people want to admit.
It also serves to reinforce the lesson, since chess does have the potential to cause such emotional distress, it is better to do what I do and simply not play against people if you think they stand a good chance of beating you.
Remember, never give anyone ranked higher than you the satisfaction of beating you. If you do this, you're only serving to boost their confidence and make them happy at the expense of your suffering.
When I want a challenge, I play rated games against Rybka 4 (I set Rybka lower than the maximum setting of course, but still high enough to beat me). When Rybka beats me, I don't care. Part of the unpleasantness of losing comes from the knowledge that the person who beat you is walking around happy because of it, thinking they're better than you, but a chess engine can never think it's better than you.