Anyway I will help alvin explain regarding how you recover from a memory card. When you delete something, more then often it just removes the index. Something like a book erasing part of its content page away. The content is still there just that no where to know where it is. As such you can use software to search and retrieve those "lost" information.
Actually its easy to see what the photographer is shooting by seeing his lens where his pointing. In the case of slr, more then often to get a proper focus, you need focus on the eyes of the subject. If you see a camera aiming somewhere where eyes dont exactly exist, he either has no idea how to take a proper picture is aiming somewhere else. Example if the photographer was to crouch really low to take a picture when your face is like looking to the right, his probably not taking a proper picture of you.
I myself have join quite some event to take pictures. Usually if I walk up to a cosplayer, I will request him or her to pose in way most comfortable for her that brings out her character. I believe the cosplayer should know more about the character then the one behind the lens.
Its sad that such photographer exist and it on general give a bad name and a harder time for people who just want to take some good pictures.