I agree threats like "If this passes, I leave" are not very mature.
I used to be in favor of such a rating - even started a thread asking your opinion on it - but after reading all the opinions I was convinced by the "other side" and I am now moderately against.
If it was to be done, it would need in my opinion a very strict implementation :
- Like / Dislike only answers, no numerical rating
- Number of votes
- Only completed campaign, i.e. someone (me?) would have to make a separate page with completed campaigns only. Actually - that was one of my projects, but even though I have some time I always find better occupations. I don't want people to vote on unfinished / demo / partial release, and then skewing the result when the campaign is finished.
- No way to vote when you have selected a "best campaigns" filter. This skews results an awful lot "Oh, yes ! This campaign was good ! I will vote for it too."
[I am still in favor of a short-list of outstanding campaigns, but for other reasons and that's another issue]