Thinspiration Real Girl Black and White

It's pretty common these days to find thinspiration real girls on sites like tumblr. I wonder whether they know that their pictures are being used around the internet- whether they made them for the purpose of thinspo or didn't realize what would happen. I feel like, if you put out a picture displaying your perfect body instead of like, a bowl of fruit, you know what you're getting into. Kind of like putting up boobs- but for girls. Err... if that makes sense.