Well, here's something I eventually found which sounds promising, I'm going to give it a try. I'm not sure how this would work with vShare since I'm mainly concerned with other types of web sites that I have (regular sites not run by vShare). If I can get this to work with a regular web site, I'll see if it works with vShare or how to get it to work with vShare (if possible).

What I think this does, if I am understanding it correctly, is that when you go to the hotlinkers site, your stolen image will appear as the web page that the hotlinked image appears on unless a person has already been to your site, in which case the hotlinked image will appear...and the hotlinker will have no clue that you've done this since the image will have been in their cache.

http://www.safalra.com/programming/php/ ... otlinking/