Images are deleted fairly efficiently, if they are not then you get an
out of control situation very quickly. Thousands of bad images get
uploaded every week, there is simply no way to give each one 20
minutes of editor time to review. This one was deleted because it
claimed to be fair use, but didn't link to any article. That may seem
extreme, but when we are dealing with thousands of images the work
really has to rely on the uploader.
Every effort is made to educate people as they are uploading, and
including fair use images isn't super easy, but some people argue that
it shouldn't be since we are a free encyclopedia.
Probably no more time can ever be spent per problem image, as we are
rate limited by number of volunteers, but better upload tools, and/or
better education about the policies would be a big help I think.
Judson
http://en.wikipedia.org/wiki/User:Cohesion