Elfpack was originally created for members of Elftown who were either banned, or who were not interested in art and sci-fi. The rules on Elfpack are not as strict as they are on Elftown, but you should still look at the Elfpack Rules. Remember, not knowing a rule doesn't excuse breaking it.
The Guards are here to answer any rule or banning based questions you have about Elfpack, and to help members having difficulties on the site.

 The Guard Captain is the person you complain to if you think a Guard is being unfair or biased.

 The Guard Sergeants are the people who handle message harassment reports.

 The Guards handle the rest. ;)

Before even trying to be a Guard, you need to be on the Council. Guards are chosen from among the senior Council members. They need to be active, have good social skills, stay level-headed in heated situations, know the workings and rules of Elfpack extremely well and have the trust of the Wardens.
Don't annoy the Guards by asking to be one. It's not even their decision.