Note the difference between newb and noob...
newbs learn... whereas noobs will always be noobs.
How about 'take a few moments to assist a newb'
I play wow , and spending 10 minutes showing someone the basics can save them hours, also chucking em some basic gear and teaching them a skill like mining is far better than just giving em gold, its the old 'give a man a fish' thing.
Generally, someone low level asking for 10 silver, I'll consider it, someone of level 12 asking for 10 gold, I aint even gonna waste my time. (for non WOW players, 10 silver might get some essential item for a low level player, 10 gold is silly money that would only be spent on luxuries)
I agree with 'everyone in a game is reponsible for everyone else's fun' It only takes one utter tool to ruin a good group or team match.
Also, just the wave of negativity in FPS's is tiresome, do you really need to give it all the 'u suck' ' lol you cant aim, quit!' etc?
I'm a TF2 player, and one of the many reasons I play, despite not really being a FPS fan, is that generally the players are good natured, you'll even sometimes get a message for a good or skilled kill, or earning an achievement. Honestly, even if you lost, a simple 'gg' or 'wd' won't kill you, and if you won far too easily, and you KNOW you're good, consider hopping teams to balance things up some.
Personally, I'd rather closely lose a match than steamroller a win in 2 minutes.