I recently asked why this id was deleted. According to Napoleon Wilson, we are deleting closed ID questions without improvements after 9 days. This policy, in itself, is fine to me (although no one can point me to an exact meta discussion where this was decided).
However, what I do disagree on is deleting ID questions that have positive answers. These are answers that people, including me, took at least some time to write out, and users of the site agreed that they were quality answers. By deleting these, we discourage people from answering ID questions at all, and we also lose the data from being searchable on Google and other search engines.
So, should we be deleting these ID questions with positive answers, or not?