Okay, instead of eating lunch right now like I should be, I peeked at the code a bit which Dan linked to in a comment. I thought these code comments were quite interesting:

     // Rules are a plugin, do not effect consensus, and are subject to change.
     // Rule #1: Must have non-negative reputation to effect another user's reputation
     // Rule #2: If you are down voting another user, you must have more reputation than them to impact their reputation

Quite interesting... means those in control will stay in control and have the power to silence others... or, depending on how you look at it, it means those who have invested the most in promoting a healthy ecosystem have the greatest power to protect that system from trolls.