This app was mentioned in 5 comments, with an average of 0.80 upvotes
I use an Android app called Notification Remover. it can be configured to hide notifications before they pop up based on the app (Nest) and content of the notification (a person's name). I'm sure iOS has something similar. I mostly use this to hide the notifications identifying myself, but it could be used for any familiar faces.
I use an Android app called Notification Remover. It's configured to remove any Nest notification with my name in it before it ever pops up or plays a notification sound.
Check out "Notification Remover" - https://play.google.com/store/apps/details?id=apps2sd.notifyremover
I was using this to remove them before I started using Tasker to do it