Magic vanishing images

In a thread in the Feedback & Questions about the Discussion Groups section of the Autodesk discussion groups, somebody called ACADuser contributed what I thought was a highly amusing bar graph as a test image. Inspired by this, I contributed a couple of test images of my own. A few hours later, the whole thread magically disappeared! It seems a shame that I went to the effort of making those images, and all for nothing. The handful of people who would have seen them on the discussion groups have now missed out on the experience. So I’ve decided to make …