Joe Smit
While good in theory, it would not have helped this particular situation as the spammer had actually over tagged the images in an attempt to make them show up in as many searches as possible. What I do think is a good idea, and may already be implemented, is a cool down period. Uploaders should be limited to N number of images in a given time period, say 1 every 60 seconds or something, and that can get relaxed if they have an account and that account has been active.
A social news site I visit does this, new accounts can only submit links every 5 mins, and that gets reduced if you verify your e-mail and the longer you use the site.
A social news site I visit does this, new accounts can only submit links every 5 mins, and that gets reduced if you verify your e-mail and the longer you use the site.