Well, speaking as a photographer, the thing about selling photographs on the internet is that you generally have to show people what they're about to buy. So right click and save image is always a possibility.
It doesn't work so well; if you use a small image size for sample purposes, and calculate the lowest resolution that is transparent for the size and sample medium selected, and then, you watermark your image samples. You can look at the sample, but not easily reuse it for publication --- as soon as you need to push it to a new medium, and expand the size; there will be quality issues.
I prefer to throw acid in my models' faces to ensure nobody will ever copy me again.
Okay seriously: I will never ever understand why photographers deliberately degrade their work in order to prevent copying. I say this as a photographer myself. I get a lot of business by sharing freely. Look, I get that we have to make a living, but defacing your own work is hardly the best way to advertise it. Musicians don't introduce noise or random silences in the MP3s they share. Writers don't include random gibberish in the middle of their online pieces*.
How hard is it to get that when you post something online, you have decided to share it? You can have any number of motivations: You might want to get exposure and publicity; you might want to get news services to pick it up; you might want to sell it as art. The first is free. The second, as this story makes clear, is easily managed via legal, not technical, means. The third... well, it's sufficient unto the day to solicit payment for the actual poster/book/print. If someone's too chintzy to lay out a few bucks for the real thing - they weren't your customer anyway.
any more than you'd take photos of paintings in a gallery and then sell prints of art you didn't own.
Makes sense that the curators don't allow cameras in art galleries, anyways
In what world does it make sense? Does anyone actually believe that, just because I've seen a photo of Monet's Waterloo Bridge, I won't ever again go to the National Gallery in London? Hint: Seeing the photo makes me more likely to want to go, not less.
* Brett Easton Ellis notwithstanding. But he's hardly a real writer.