Even if you propose that there should also be a way for people to give them positive points to reduce their negative obnoxiousness level, it will still not stop the unfair usage of the system, in my opinion.
What we are doing is trying to introduce a third rank in the forum:
- merit system: effort put in post writing
- trust system: credit worthiness when dealing
- obnoxiousness: un-popularity contest
If I am not wrong:
- The first system would be the only one not allowing for negative vote.
- The second system would allow negative votes, yet not weighted.
- The third system would low negative votes, weighted.