the photos are accessible to anyone. I honestly don't care, the people who steals photos usually either are not making money off it, or not making enough money off it. Keep taking more pictures, sell them if you can, and find bigger fish to fry. I'm never afraid of people using my photos illegally.
Yes, once or twice it happened 'by accident' by large corporation, all I need to do is send them a cease and desist letter and they always comply.