Nice idea, but I think your time is probably better spent elsewhere. Trying to combat assholery in this game is trying to combat the game itself.
Maybe so my friend but if all your teeth really have wisdom, then reach for your Molar and think... how nice it would be to be able to step out of a town, not worried that anyone will try to follow you or try to take all you have in the name of "Greed". Then tell yourself that this is not a worthy endeavor.
It sometimes isn't even "greed" as a reason. I guess you can hardly believe that some people have fun just from shooting to pixels. You cannot change it with billion of wise and nice words, and phrase "Wasteland is harsh" is obligatory. Luckily, must I say - it is post nuclear world, full of dangerous places and creatures, not some "happy-no-sex-or-violence-country-of-carebears". If you want to help some beginners with start, just do it - share your items, help with hunting brahmins for tent, start an orphanage (as I did). It is my little bit of satisfaction, when some time later I see my "orphan" became "adult", with good toys, enjoying this game.