Very interesting attempt at identity theft and clearly easy to fall for. Thanks for writing it up.
I suggest you add to your post and suggest that people reconsider enabling the Medical ID information. The feature is enabled or disabled here:
Health app > Medical ID > Edit > Show When Locked
I suspect it is much more likely that your iPhone will get stolen than it will be used to identify you for a medical emergency. But that is obviously for each person to decide on their own.