It seems that the staffing ages varies from really young to just adults. Like someone mentioned, this is a good thing because there are people in the staff that really could represent some parts of the community.
Though, the staffing shouldn't so much worry about the ages of the individuals they choose to hire, but rather, the quality of the work and effort they put into being in this community. Age is simply something people use to immediately judge someone else. Take me for example, I'm 13, but I'm not one of the individuals that act dumb and post in ridiculous language all the time. On the other hand, there are people who are 50 years old that break the laws and seriously can't get a grip.
It really depends on the quality someone may put into the work they do on the forum.