(
Sitting Standing at work) Thinking about this today...
1) I'm not too sure on forum staff members actually having a reputation. From a newbie point of view you come along and see a mod has a poor reputation; what is that going to make you think of them as a mod?
2) If more usergroups who can vote are added, then whats to stop ganging up on one another.
3) Moderators/admins are more prone to being given negative ratings as they are likely to become unpopular for locking topics, deleting posts, warning other members.
4)I really dont like the system at all and dont support it as a bopard feature, but am willing to work with it.
My 2 pence.