Here ya go. This is the way I block out all fuskers with .htaccess. And I even make some money off them. Instead of the pics they are trying to hotlink, the surfer sees an ad I have made up. The ad asks them to type the url in my ad in their address bar. The result, fusker doesn't get my pics, and I make the occassional sale.
Options +SymLinksIfOwnerMatch
RewriteEngine on
RewriteCond %{HTTP_REFERER} .*.fusker* [NC]
RewriteRule .*\.(gif|jpg|jpeg|bmp)$ http://www.yourdomain.com/images/hotlink.gif [R,NC]
Have fun! P.S. Your server configuration may not need
Options +SymLinksIfOwnerMatch
Try it without first.