I have an Osprey backpacking pack that's about 10 years old. I had a squirrel chew through the zipper on the removable pouch. I sent it off to Osprey to be repaired and they sent me a brand new pouch.
The mobile app definitely has mark as unread. It's the envelope icon next to the trashcan (the exact same icon as in the web interface). Never realized there was a report phishing option. I just mark those emails as spam, which is available in the app.
The Nest smoke detector microphone was never really secret. It was part of the monthly self test to determine if the alarm was working. It would send you a notification telling you it was going to sound the alarm and that it would be listening for the sound to confirm it was working.