SIM-card registration

[Montmorency]

The communication is the object of interest and now I wait for you to explain how you communicate with a toaster.

IoT junk. Easy to compromise anyway, or so they say.

[Husar]

IoT junk. Easy to compromise anyway, or so they say.

Well, even your chatty toaster will need a device that shares a landline or mobile connection (via SIM card) in order to connect to the Internet of Toasters. Therefore registering the device that allows a direct connection to ISP internet nodes is sufficient. In Germany it's not a good idea to have unencrypted WiFi because if someone parks in front of your house and uploads child porn using your unsecured WiFi, you will be held responsible. That's actually why you will find no or very few unsecured WiFi locations even in German inner cities.

It's true though that many IoT devices, including "Smart" TVs are not very secure and often get compromised, e.g. for use in bot networks so they participate in DoS attacks and the likes.
https://www.engadget.com/2017/04/25/...smart-devices/

Permanent denial-of-service botnets like these can infect poorly-protected IoT devices like smart toasters and web-enabled vibrators to bring down various connected web servers.

Your smart toaster and vibrator may actually be part of a criminal network.