Comment by colechristensen

This is a strong statement that probably isn’t true. The power transformers in those devices usually aren’t controlled and the things which are controlled will only sometimes be able to start fires. No doubt that some “smart” devices will have vulnerabilities that could cause fire, but just because there’s an available controller does not mean there’s an avenue to set fire to a device.

In short, unless a device is profoundly poorly designed, there’s no way to blink an LED so incorrectly that it starts a fire. (And many smart devices really aren’t doing much more than that)