Excellent points gradient. I can only repeat my comment above: "That's why I'm keen to get visible watermarking accepted as a necessary norm and not to attract ridiculous comments and bad ratings".

The way to do this is to publicize what just happened and educate people that the world of the internet is different - and the modern world is full of scavengers without conscience. I can imagine thousands of desperate people turning up for interviews around the world with a folder full of Renderosity posted pictures they didn't do. Back street printer turning out our work on postcards and selling them for more than we'll ever make. Students embellishing their work with ours and getting top grades, when they really aren't any good at all, and meanwhile the talented among them get sidelined... commercial websites using our work to look good.... that rings a bell! That just happened.

Whatever they say to apologize, there is no excuse. They should just have asked us for use and some here would have allowed it. They just couldn't be bothered. Too hard work, to much pressure, too much to do... multiply that by the world.