Recently, I noticed that a significant percentage of my web site traffic was for a single image 
of Blobby the Blue Lobster, all with referrer strings indicating a particular web board. Sure enough, I went there and found that one functional illiterate was using this picture as his avatar in his conversations with a bunch of other functional illiterates.
If you don’t believe me about the functional illiteracy, here is word for word one of his posts to that forum:
OMFG that was so fucking funny i cant belive that people belive that shit haah…john malm wow im so happy hes gone again after reading this.
But i msut say between reading all of that and the XMF interview the romm is freaking spinning ive read alot today including a bunch of video games ahah well tt you all alter
Anyway, I don’t like picture leeches much, and I especially don’t like illiterate ones. So I put the following in my /etc/http/conf/http.conf:
RewriteEngine On
RewriteCond %{HTTP_REFERER} ^http://www.echoingthesound.org/.*$ [NC]
RewriteRule .*blobby.*\.jpg http://xcski.com/~ptomblin/pork.gif [R,L]
Which directed every request for his avatar to 
a much smaller picture. But he didn't get the message, even after I wrote to him telling him he should check his avatar. So I took more drastic measures, and yesterday I changed the redirect to 
an even smaller picture that makes it more explicit.
Today I see on that web board a post from him saying
Ok so i look at my avatar and some guy must have hacked it and it said "I'm a PIcture LEech I suck" and someone ahd contacked me before adn tlaked somethign about my icon that i needed ot refresh it or somethign but it made no sence to me so whats up?>
Amazingly enough, he's changed his avatar, but he's still leeching - the image he's using is on somebody else's site.