I'm surprised how many people are happily buying and using WiFi smart lamps from questionable origin. It would be somewhat hilarious if Western internet gets sabotaged by lightbulbs in the case of a military conflict.

But yeah, it's hard to secure home networks. One step would be if expert users and ISP boxes would make a separate WiFi network/VLAN for IoT devices. Second, there should be more regulation and education about not connecting crap devices to your network and/or Western sellers (Amazon, Best Buy, etc.) should be liable if they continue selling a device once it is known that it is malicious.