rogue image identification

[tim_n]

I'm looking starting a service that allows people to upload images into my system.

unfortunately I don't want them to upload numerous rogue images that have nothing to do with the service I'm offering them. By rogue I'm talking tubgirl/goatse style images.

Obviously I could just block jpgs from the site (the site only needs technical drawings) but if there was some kind of trick someone knows of I'd appreciate implimenting that instead.

[yamangman]

Administer what gets uploaded? If it's low-volume have the service shoot off an email to you giving the URL of a 'holding' page?

[Iain]

Let the community do the work. When someone uploads a file, once they've submitted it ask them to indicate whether a previous person's image is legitimate, appropriate, etc. Would be just a simple yes/no radio button and a button press. Once an image has x number of "yes" answers it becomes published. This all depends on the volume of traffic you get right enough, too few and an image will remain unpublished for a long time so you may want some admin views to trap for that.