Those of us with the skills to do so segregate our IoT devices from the rest of our network. I have a half dozen VLANs in my network with a number of firewalls to prevent those devices from doing anything but go to the Internet, and they go through a VPN and proxy to prevent endpoint identification. Devices that don’t work in those configurations don’t stay on my network.
Unfortunately most consumers don’t have the skills or equipment to do this, so they blindly connect their Alexas, Google Homes, Nest thermostats, Roomba vacuums, digital door locks, IoT lights, sensors, and everything else to the same flat network where they can interact with laptops and PCs to build information on everything from the layout of your home to when you’re sleeping.
I was just speaking to having a bed with Internet, which seems ridiculous. They try to tell you it could SAVE YOUR LIFE by monitoring your vital signs or something. Uh uh. Nope. Not gonna happen.
We have no Alexis, Google Homes (whatever that is), Nest thermostats, Roomba, digital locks IoT lights (whatever they are), sensors, etc. When I learned that Roomba could map the floorplan of a house ... yikes!