Here's a quick tip. While checking my stats to see if the FunWebProducts bot was still being blocked, I noticed that there were a huge number of hits for one of my images. I had previously noticed that a website was hot-linking to another small image months ago.
At that time, I figured it didn't hurt because the image was just about 1KB in size, so I did nothing. However, this kayu website (a very big website with thousands of Malaysian users) started hotlinking to multiple images and was beginning to eat up my bandwidth. So I decided to block all hot-linking.
It's pretty easy to block people from hot-linking to your images. Just add the following code to your .htaccess file :
| # Stop HotLinking RewriteEngine on RewriteCond %{HTTP_REFERER} !^$ RewriteCond %{HTTP_REFERER} !^http://(www\.)?positivemoneyideas.com/.*$ [NC] RewriteRule \.(gif|jpg|js|css)$ - [F] |
This should effectively block all those dartardly evil doers who don't have the decency to create their own images but instead choose to steal not only the image, but to eat up my bandwidth while stealing!
Awww you're way too nice, Andrew!
When someone starts doing that repeatedly and taking up your bandwidth.. you should point all your data to a new copy of the file, then replace the old one with something inappropriate or amusing.
I've seen/used everything from a massive in area but small in disk space graphic that said "THIS WEBSITE TRIED TO STEAL MY BANDWIDTH" to some.. well.. stuff you shouldn't see 
Hi mike. Thought about that. I found out that this is a scammer site with a very bad reputation and known to be administered by bad hats, so I am taking a long winded, but non-aggressive approach. I've re-designed the hotlinked image. It's now a white 1x1 pixel that's about 100 bytes. After about a month, I will delete the file.
Hello webmaster
I would like to share with you a link to your site
write me here preonrelt@mail.ru