Posted By cmkavala on 11/12/2008 12:21 PM
I have confronted them, but there is really nothing you can do, once you post online it becomes public property.
That's actually not technically true. Any content published online is implicitly protected by copyright, at least in most countries. But enforcing your rights can be rather difficult, especially if the offender is in a different country. You can apply watermarks to your images, which will be difficult or impossible for them to remove. Some watermarks are effectively invisible, but can be detected by digital analysis, which is only useful if you intend to follow up with a lawsuit. It's clearly not worth it most of the time.