It's more the principle of requiring additional information after a reservation has been booked instead of being up-front about it, and sending it over unencrypted email.
The biggest issue is that I responded to their original email within 24 hours, but have now waited 10 days without resolution or any feedback.
You've already let a "stranger" into your house, but these details to too sacred?
Just take photos off all and black out any info you don't think is appropriate.