Images in Comments!

This one is like nested/thread comments. A wonderful idea ... with messy issues.

My leading suggestion to clear out a wad of the mess, is to encourage the commenter to upload the image to the site, where it is retained permanently as an Attachment. "Rights" can be affixed to the file. Folks will in many cases grant full rights to the site.

But even with outsourced images, I say eat the downside and go with it.