>I'm not sure how intentionally[1] opting into an agreement to have your thermostat remotely controlled is an argument against having it connected to the internet.
???
I think you immediately followed that up with more than one answer to that?
Users being stupid and not reading what they are signing up for is not a argument against connecting the thermostat to the internet, and hypothetical bad actors are just that, "hypothetical". If you'd linked an article demonstrating concrete proof I'd accept it as an "argument against connecting one’s thermostat to the internet".
???
I think you immediately followed that up with more than one answer to that?