Lowbie zones are rife with trash-talking, unorganized, grabasstic pieces of amphibian offal. Once you get past about 30, you don't see them much and people who've stuck around that long either know about it or are much more interested in playing the game rather than championing the virtues of monocharacter play. You'll still see the occasional brain-trust-on-legs type but they're fairly few and far between. And once you hit 60+, going back to hillsbrad to clean out 70 gankers earns quite a bit of "OMG I love you guys!" comments. :P