I think I'd rather have the film tag remain blank and just edit over the appropriate images and leave a wiki in film directing to other tags. The reason for this is because "film" could be used to mean the strip of film, a film cartridge with no strip exposed (haven't seen an image yet like that though), or a motion picture (at least two images currently under the tag are using it to refer to a movie being played).
There is also one image under film in which it has photography material and some containers labeled "film" post #907308.
edit: Missed this image for using film to refer to the film cartridge without the strip showing post #995324
Updated