I went to her website and saw some of her photographs. She is very talented. 
I understand that if you want to, or have to, live from your sellings, you try to protect your work. But on the other hand, I also think that many more people will visit renderosity that a personal website. And there may always be some buyers, collectioners even, or at least friends amongst those. Same goes for Google. Via Google, people will get to her site.
If you don't add a specific line to your page googlebot will always show your images. That's the Internet. There are other sites that are far worse, sites that simply take over the rights of your work the moment you upload something on them.

There are no Borg. All resistance is fertile.