Often one or more images are required in minimal working examples or as part of some example code of and answer to make it compile successful and/or give some nice visual result.
One problem is that this image can't be easily provided with the code.
demo option of the
graphicx package can be used to replace the image with a demo rectangle using real images is IMHO better and more accurate if more then one different images are required, for example to show how to align them. (Just happened to me in Placing images left and right of each other.)
To easy this we could have a set of official example images and promote the use of them in example code for both questions and answers. The images should be already located in some common LaTeX packages, so that most people already have them and (La)TeX can pick them up in the TEXMF tree without much hassle. A good example is the famous PostScript tiger locate in
Are there any other suitable images provided by common LaTeX packages? Having them in both EPS and PDF format would be great.