what do the titles mean?

[tbaher]

You know the titles below people's names when they post like "Junior Member" etc...
I think they change depending on how many posts you make.
I know the mods have custom ones.
I know banned people have "banned" in their title.
My question is, what other ways are there to change your title?
I've seen people with titles like "Supreme Idiot" and I don't think they're mods.
Did they anger the mods or is it like a warning before you're banned?