I recently found one of my Hoya photos at a website
http://worldofsucculents.com/h... with my copyright/watermark cropped out. They do have in small letters at the bottom: "photo from davesgarden.com" but it bothered me that they cropped out my name as owner of the photo. I used their contact link and sent an e-mail asking that they remove my photo from their site or credit me as being the owner and told them to never use my photos without explicit permission but they've never responded and I see that my photo is still up at their site.
I guess it's a chance we all take when putting our images on the internet ...