If Siri or Google were doing this, it would have been whistleblown by someone by now. As far I as understand, Siri works with a very simple "hey siri" detector

If Siri or Google were doing this, it would have been whistleblown by someone by now. As far I as understand, Siri works with a very simple "hey siri" detector that then fires up a more advanced system that verifies "is this the phone owner asking the question" before even trying to answer. I'm confident privacy-sensitive engineers would notice and flag any misuse;