I agree that it doesn't seem to fit the standard set of operational guidelines.
If I delete my own question I should then be able to un-delete with fair ease. However, this is not the case. The question is voted by multiple users to delete - therefore, an equal (if not greater) number of votes should be required to un-delete.
This appears to be too easy.
Its by-design, because of upvotes and answers counts according to Jeff here, and yes, I voted to closed as duplicate.
Note: In my case, I have deleted myself instead of keep undeleting it.