JAB_Creations - 6:45 pm on Mar 28, 2012 (gmt 0)

If they're directly linking you can add exceptions to domains you wish to allow and then rewrite all other requests to images to something else.

.htaccess

RewriteEngine On RewriteCond %{HTTP_REFERER} !^http://(www\.)?example1\.com [NC] RewriteCond %{HTTP_REFERER} !^http://(www\.)?example2\.com [NC] RewriteCond %{HTTP_REFERER} !^http://(www\.)?example3\.com [NC] RewriteRule \.(jpe?g|gif|bmp|png)$ images/prevent-front-lawn-hippies.gif [L]

Having people "steal" your content means you're not realizing what a marketing gold mine you already have. Stick your website's address on the images that doesn't overpower the image and you'll find that people will actually actively come to your site looking for more.

- John