I was under the impression that it was just images that were in the top 5% that were blocked from being deleted or resubmitted but images of mine that are not in that category are locked, why? and why lock any of them? shouldn't we be making the decision what stays?
Images that win 5% or better awards are blocked from being deleted. This is a relatively new rule and we put it in place in order to prevent people from resubmitting the same great images over and over - it became very annoying.
You are welcome to delete these images - you just have to email our moderation team in order to do so.