It's a naked picture of you that doesn't really look anything like you and contains no identifying metadata. Imagine if the last 100 naked pictures from Logan ended up on the internet. Would anybody be able to identify them?
Maybe not, but they also have a list of exactly who was there at the time. We cannot examine the software, so we have no guarantee that it really blurs face and privates. Don't you think they might be able to do some analysis with either a full-body or partially blurred collection of scans over time?
