That's a great idea.
I'm going to disseminate the hottest image ever seen by man, say:
http://hotimage.com/fucking_hot_image.gif
It mod_rewrites to a serverside script that gathers everything it can about the user, the URL it's sourced on, etc, and then just dumps some stupid image data to the browser.
I then sell that marketing data to anyone who wants it.
Fucking data mining genius.
And I must say, it sucks, but how can you stop it?