Once an idea hits -5, instead of deleting it from the system, why not move it to a “dead ideas” area where people can go and browse if they really feel like it and they have the option of upvoting. Once 10 (or just X) upvotes are received, they are revived and brought back to life as though they were just submitted except that those who’ve previously voted on it cannot do so again. Also if you have created the idea, you could spend a submission to revive it instead of having to re write it.

It would be away from the regular submissions but would save from mbumive downvoting while still allowing downvoting for players who vote legitimately.

In effect it would be similar to removing downvoting, except without the woman's genitals, rainbows for all feel of some sort of mother shaking her finger and telling us all to play nice, be friends and that “If you can’t say anything nice, don’t say anything at all.”