On the plus side everyone who comes across this subthread will have it in mind the next time a friend talks about this great IoT idea they have. Better culture starts at the bottom with one person sharing a thought with another.
You've gone off on several people now who got the exact same impression rather than accept maybe you're not a flawless communicator. You can't expect more charitable reads from others if you're not willing to be the first to give others the benefit of the doubt. This lashing out is definitely not going to convince people you thought about security in advance.