>No down voting: So people will not lose karma just for having an opposing view. Still better would be to make downvoting cost one point to the downvoter. This

>No down voting: So people will not lose karma just for having an opposing view. Still better would be to make downvoting cost one point to the downvoter. This would discourage rather than prevent downvoting (and people will happily pay to correct real injustices). It would also more accurately reflect human psychology: in IRL conversations a participant occasionally gets angry, but it always comes at a cost to himself.