After reading all the pros and cons, I can actually understand why it's a hard decision for the admins. Yes it sucks that you can't a start controversial thread, or even say something remotely controversial without getting a flood of negs. And I know a lot of members who got intimidated or chased out from the forum because they said something "out of line". But at the same time, if the only way you can go is up in terms of rep, why even have it. We'll all have the same rep power by the end anyway.
I think you should have a trial period and then people can vote on it. Or change the neg colour to something nice, since red has such "evil" connotations.