Board Thread:General Discussion/@comment-372573-20141022213732/@comment-1038387-20141022215108

You have the liberty to set your own rules on images, of course. You can set a limit to the number of "personal" images, or state that all images have to be used purposefully on the site.

Explain to the user that there are plenty of image repositories available, and that you'll be deleting the images (to give him time to readd them to another site). Give him a fair window, a week or so. After that, they're gone. Should the user cotinue, warn with a block.