There seem to be a lot of questions (usually fairly straightforward ones), which end up with 3/4 answers being laid down within a couple of minutes of each other with almost identical content, this one for example.
Depending on how quickly the answers get posted, it appears at least some of the right answers will get up votes, so there's no reason for all of the posters not to leave their answers. But really, most of them are just noise, that detract from any answers that have actually taken a different approach to solving the problem and so may add some value.
So I'd like to propose a new (Magnanimous?) badge with rules something like:
Has deleted own answer with score of X or more, and upvoted competing answer on Y occasions.
I'd say a reasonable value for X would be 1 or 2 (the answer needs to have been upvoted at least once to prevent people posting a silly answer, deleting it and upvoting a competing answer just to get the badge).
A reasonable number for Y, based on the current badges would seem to be 10 / 25, depending on the badge color.
What do people think?
Would a similar badge for deleting 0 voted answers older than XX days help to clean up as well, or is the voting system enough to take care of this by hiding the low scoring answers?