It might be annoying for some people that when clicking on a missing image in, say, a crafting grid, it tells them to upload the image rather than taking them to the item page.
E.g. There is no image for the Magnalium Plate, and when on the Magnesium Dust page, there is a recipe for the Magnalium Plate. When the missing image is clicked, instead of going to the Magnalium Plate page, it brings them to an upload page.