This is a cute PoC of how much easy it is, but with freely available forensic tools like, say, PhotoRec is possible to extract much more meaningful and diverse

This is a cute PoC of how much easy it is, but with freely available forensic tools like, say, PhotoRec is possible to extract much more meaningful and diverse data (entire files, images, database files...) that by simply running strings. So, don't take it as the maximum damage one can get.