This page is a 'name-and-shame' page of people who I have found to infringe my copyright. All instances have been, or are being, solved. If you find any other instances on the internet, or elsewhere, it would be very much appreciated if you could contact me. Most of these examples are either people including my photos in a blog post or using my photos as a background in their CSS. With regards to the CSS issue: it is usually not the site themselves but a function of the site whereby their users can upload their own CSS sheets.
The Hotlinking aspect can be countered by following my Tutorial on Hotlinking, however, nothing can counter the copying aspect - save not putting content on the web in the first place. Perhaps this is a good time to note that just because something is presented on the internet does not mean that it is in 'the public domain' - speak to a lawyer for the very real distinction.