my rationalizing behind that:
a) I'm sad that i didn't get any feedback on my latest weekend project. (That's the emotional part)
b) But also i believe that the timing was just bad. 5 to 10 minutes isn't much of a window.
deleting gives the opportunity to resubmit it.
said that: i know that this is kinda "gaming HN" and should probably not be possible. (@pg)
my vote/like/+1 for a http://news.ycombinator.com/show view.
p.s.: shameless self promotion: here is my latest "Show HN" submission https://news.ycombinator.com/edit?id=4053553