You know, I gave this some more thought last night while fighting the insomnia. If it works like rep, and you have to hit about 30 people before you can give - rep again, it might not be so bad. Also, if the - rep is commensurate with your rep power, not so bad. That way, if some troll keeps making new accounts to - rep someone they hate, it will be a big zero for their effort. This means that the people who have established themselves and have a higher rep power, can knock the new people, who mysteriously get a full bar in under a 200 posts) back down pretty quick when they start acting up. Maybe not such a bad thing. It actually makes the rep bar more valuable, and more in line with what the community as a whole thinks.