Why?
But if things like this _actually_ trigger any sort of response, then the effed up thing isn't the (childish) prank, it's the system actually acting on nonsense.
If I call the police and claim that you're armed and hold hostages, then that's irresponsible. If I shout bullshit instead and these novelty devices turn that into a web search, there's no way in hell that should have any consequences whatsoever.
Also, Google saves all voice commands. If the NSA wants to check they'd just hear all of us doofuses giggling and trying to one up each other.