Disable Hotlinking and Prevent Leeching

Wonder if there is a plugin what disables hotlinking? Hotlinking is also known as bandwidth theft. It is when other sites direct link to the images on your site from their articles making your server load increasingly high. If one site does it, it might not make a significant difference, but there are too many spammers that will do this and that is something your server cannot hold specially if they copy your article with a lot of images. No matter how good your web host is, it will be slowed down if hotlinking is not prevented.
Thanks for any suggestion!