This would put less strain on a single server to serve all these images, save disk space and let users in control of their content, for exampme if they want to remove a screenshot or replace it.

edit: btw, I generated a list from an old scrot directory that is (suprisingly!) still up ! If someone wants to add it to the list: http://pub.z3bra.org/img/wm/nx.html

edit2: would a gopher link work here ?