Like on most big forums you can't just follow some rules and you'll become a moderator. They (admins and staff) will choose you if you hard work, help a lot of people, do some nice tutorials, etc. That's how I think it's made, but I can be wrong.
That's what happened with me. I wrote up this epic guide and theymos said "that's a sweet ass tutorial you created... want to be a mod?" and I said yes.
No mods have a sense of humour. It's actually one of the requirements for the job. Srs bsns here no time for mucking about.