The already-suggested list is not a bad idea, but here's mine anyways
Newbie: Grade C Derp Cat
Jr. Member: Skald
Full member: Cleanser
Senior member: Mage
Hero member: Grade A Expeditionary Kitty
Moderator: Cleanser/Forum Thor
I love the suggestion of having banned people listed as infected or trolls.
Is there a way of giving custom titles based on activity? For example, one who writes a lot of poetry could be known as a skald, one who discusses the world and the story a lot becomes Tuuri, whoever has a cat avatar is an Expeditionary Kitty, etcetera.
Also, if we were to consider the nationalities page and write them in order of how much Iceland likes them...
Newbie: Primitive Finn
Jr. Member: Naïve Dane
Full member: Messy Swede
Sr. Member: Brave Norwegian
Hero Member: something with Iceland... I can't come up with anything, truth be told