I agree in principle but what does that really mean? I wish you could come up with something a little more defined. 
and flotsom, nice addition to rule 1! I completely agree. 
he is saying it is all in one's own attitude.
For example: Player A cherry picks Player B.
Player B could say: 'You suck, you picked me, you cheated, you cant fight by yourself, loser.'
or
Player B could say: 'Doh, I should have seen that coming. Good kill S!.'
The same result happens, Player B got picked. But with the friendly answer both players had fun, with the insults, niether had fun.
So all Dan is saying is if everyone made an effort to be more friendly (and even more so, tolerant) no matter why or where they died, the game would be more fun for everyone.
Correct me if I am wrong Corky!