Can I just point out that the reputation system is not a popularity contest.
You are supposed to be posting comments that tell the user in question where their strengths and defficiencies lie. The points provide an incentive to take notice, and also let other users gauge how 'authoritative' people are as a source.
If people keep posting useless comments that don't tell us anything, post no comments at all, or use the reputation system as a bashing stick for people they don't 'like', then it's not going to work.