Just to continue with Barts post above:
This is why Guilds who have been around for some time do not promote officers right away - and NEVER promote officers who ask to become officers!
ASKING to become an officer in a guild put a big target on you saying 'Im power hungry'...
Hard work and actions of a player over a period of time (each guild has their own guage for what this time should be - but can be days, weeks or even months) those who work hard in the game helping others, are fairly consistant in being in the game (real life DOES come first, but ones a month usually doen't cut a good officer), and try to become well informed about the game (locations of items, understand good weapon usage, quest assistance) make good officers...
Players may also become trouble later (you always hope everyone gets along - but its not always possible) and Guilds must have a good groundwork to deal with these issues as well).
Finally, the Guild must be run by a Good GM (or if run by a GM Group - a stong GM Leadership) to make the hard decisions when it comes to problems - as unfortunately things like this happen and decisions have to be made.
Here are a couple of poss on Guild Creation (One by Bart himself above
)
So you Want To Start A Guild
Crews And Guilds