People need to create their own trusting bonds with people, not look at a list and say "oh, you're trusted, I guess I'll make you admin or something even though I don't know you".
For example, I only give admin to people whom I've known (either in real life or in-game) for a good amount of time, and that I know I can trust. Because then I know how they do things, and I can usually predict the outcome of several situations.