I don't think they can be trusted to be either secure or reliable or even supported. Any of them could be remotely disabled at any time as the parent company goes out of business. On the other hand, at the moment they're mostly in frivolous devices. As they become ubiquitous this is going to demand EU-level intervention, just like the existing WEEE directive against lockout chips on printer cartridges. Americans will…
caveat the neighbour of the emptor, whatever that is in Latin. Your neighbour’s video doorbell will have the easiest time picking up on your face, but your neighbour’s cloud WiFi AP will surely see your WiFi devices coming and going in WiFi range through the day, and how long will it be before Siri is listening to your upstairs neighbor’s footsteps and telling you they’re unusually quiet for this time of the week and…
More likely the Ring camera will spot someone that's not in the national Amazon facial database and urge you to report them to ICE.