2 of 6 added 337 characters in body; added 4 characters in body

This already happens, though -- if a question has sufficient answers and/or votes, the question owner is prevented from deleting it.

Originally based on
http://blog.stackoverflow.com/2009/01/adventures-in-delclusionism/

Edit: I've tightened up the requirements here based on recent abuse by a specific user. You can only one-click delete when

  • your question has zero answers
  • your question has only one answer with zero score

Anything else, you must vote to delete and/or flag for mod attention, and attempting to delete will tell you that.