http://meta.wikimedia.org/wiki/End-user_image_suppression has been fleshed out a little now and discussion about its desirability has been moved to: http://meta.wikimedia.org/wiki/Desirability_of_end- user_image_suppression
I have a couple of specific questions on: http://meta.wikimedia.org/wiki/Talk:End-user_image_suppression - How might the user-preference option work? - What might performance and caching implications be?
And some opinions on how easy or difficult this would be to code would be welcome too.
Thanks, Christiaan