Copyright is one thing, defending a copyright another. Unless you've got a significant track record can prove you've lost tons of income due to a specific instance of pirating, no lawyer is going to be interested in defending you. Anything posted on the web can be nominally copied, even
if they just rephotograph the screen. A few jerks have even taken cellphone shots of photographic prints for sale at art fairs and copied those
for their own walls. So what. All they got was a ball of fuzz. Keep your jpeg content modest in the first place and that's all they will be able
to steal. And if you just happen to get the world's fist shot of Elvis and Bigfoot both landing in the same UFO, don't go posting it on the web!
Sell it to some big news network first!