Working girls are usually very careful to protect their private lives and can’t risk being identified. Faces can be blurred out in photos, but most of the girls at DL have tattoos and piercings, or a hairstyle, body shape, that could easily identify them. If all of that is shopped out there is not much left of the original photo. I think the important thing is that the image gives a realistic impression of what to expect. DL are usually fairly good at this, unlike a lot of other places with impossibly glamourised photos.