Did you, by any chance, get this idea from the DPreview's Nikon forum? This was the hottest thread there for a few weeks Smile.
No I got the idea after replying to rbndave's thread in the " Questions and Answers" forum titled "Someone is using my photos" he has an image with 503 direct links!
I wonder if these massive numbers of direct links could be due to an image link being placed in an e-mail which was repeatedly forwarded resulting in a new direct link with each recipient. It is hard to believe that some images would get taken for illegal use on so many other sites.... but I could be wrong.
I 've checkout all your photos and they are great I can see why someone might take them. Once I got an e-mail asking for the original 3MP version of one of my photos. I said I'd have to know what they wanted it for (as it featured an identifiable person) and they didn't reply.. but the image in question gained a direct link, so I guess they thought that the pbase resolution was good enough and they'd take it that way as they'd not really copied it.