Nope. I don't have time for that. I usually pick the ones I want to scrap and copy them to a "to scrap" folder on my desktop. Then if I need more than that I can go back to the original folder. When I'm done I delete the to scrap folder, so I know I've scrapped those.
I saw something yesterday that I liked, it could be applied to photos. They said go ahead and rank everything 1-10,1 being the best. Then delete everything 5 and below. If it's not better than half good, why would you want it? I'm going to start culling out my photo folders with this in mind!!