> This may be a problem which requires a procedural solution rather than the goodwill volunteerism of HNers.

I noticed most of the accounts whose submissions were killed were created just a day ago. Perhaps it would be best to disable submission of stories by accounts that don't have a certain number of karma points and/or haven't existed for a certain number of days?

There would then be the issue of HNers who wanted to submit stories/comment anonymously occasionally, but that might be best solved by having a "submit anonymously" option.