wrgvt - 2:59 pm on Apr 28, 2008 (gmt 0)
People who hotlink images usually don't specify height and width. I've used this to my advantage in the past. I've renamed the original image on my site and replaced the hotlinked image with a huge image. The hotlinker expects something to be 100px by 50px (for example), and when I replace it with something like 450px by 250px, not only do they get an image that is useless for them, it blows their whole page setup out of the water.