Hmm. It's possible that the user would manually access it, which is why I put it in. Here's a use case:

1. User loads his HTML file, finds a broken image.
2. User says "well, is there anything in my /img directory" and adds /img to the URL
3. User looks at what's there to figure out the correct name of the image (previewing images by clicking them to find the right one.)

I think this is a pretty plausible use case, esp. given that we don't have image preview in brackets.