Also see Burger King hijacks the Google Assistant, gets shut down by Google (Ars Technica)
"The 15-second ad features a man in a Burger King uniform leaning into the camera to say: “OK Google, what is the Whopper burger?”
People with the Google Home assistant and Android phones with voice search enabled within listening range of their TV discovered that the command triggered devices to read aloud the Wikipedia entry for Burger King’s flagship burger.Google Home devices stop responding to Burger King's TV ad prompt | Business | The Guardian
The intrusion was short-lived. Google Home devices stopped responding to the prompt spoken in the commercial a few hours after it launched. The devices will still respond if someone else (eg the real owner of the smart assistant) asks the same question. It is likely that Google updated the Home software to ensure it didn’t respond to the specific Burger King sound clip. Google did not respond to a request to confirm this."