How do you figure out whether or not a question needs to be deleted. It's not a duplicate. The only problem with it is it is extremely subject to that one person and probably will not help or effect anyone? It is a new user and by the looks of it looks like he is just grasping a random question for some reputation.
Ideally all questions that get closed should be deleted, except for the questions closed as duplicate. Some questions manage to get the 3 votes/1 moderator to delete them after a while, others fall through the (wide) cracks. There's really no rhyme or reason to deletion, except for the part where particularly bad posts attract more attention from our reviewers/voters.