Would be pretty easy.

1) As a neutral, either you are ambivalent to things or you have a cause which is not either good or evil. In the latter scenario, that cause should be the focus of your character. If its not related to wealth or objects, those should not become the focus of your character. Such examples of bad behavior include :

a) A druid making a mad dash to loot an out of range person's gear from a mob kill.
b) A cloud ranger talking for hours and hours about what sort of nice gear they'd like to get.
c) A gnome invoker plotting with others to try to assassinate someone for a wand they have.

2) You should not kill good NPCs as a good-aligned person if it can be avoided and never just to get items or money.

Anyway, I'm just saying. People have done what Halistanis has done (loot out of range people, gear whore to the 50th degree around kuo-toa/silent/etc all day long while cabal is being raided, make repeated mad dashes for stoneform after a reboot, etc) and not gotten titled. I don't disagree with the title. Its just that tons of people have also played the "I'm a neutral assassin, its cool for me to kill anyone and everyone I can find in case they have some money on them" and never been bothered about it. Ideally, in both cases, you'd be punished.