I like the system we have in place. I have gotten both negative and positive reps, but I will admit that I haven't gotten any "coordinated" negative rep attacks.
I rarely give negative reputation points. If I do give them, it isn't because I disagree with someone. If I disagree with someone, I will tell them why and be done with it (and if they disagree with logic and grace, I will give them a positve rep). That is the whole purpose of a discussion forum. Discussing... in a forum...
I only give negative reps to people that meet certain criteria.
1. Stupid thickheadedness
2. Social ineptness (consistant name calling fits in here)
3. Bad Taste
They have to meet all three before I will consider neg-repping. Some people can have a post that fits all three, but it is a rare thing. I disagree with a large number of people here. It isn't the disagreements I dislike (if it was, I would go "discuss" things elsewhere). It is a vindictive smug attitude followed by name-calling and shallowness that leads to negative points from me.