More a "what I have learned", that the Google Now assistant (Siri-like thingy) can actually be useful, eg is able to send SMS/WhatsApp chats hands free.
"OK Google, Send a WhatsApp to Mrs Ham"
...."You want to chat with Mrs Ham, OK, What's the message?"
"I'm on my way back, should be about 2 hours, etc etc"
...."Do you want to send or cancel?"
"OK google, read my message back to me" (hint: This is one step too far)
...."Duh?" (or the equivalent)
Cue a very one sided conversation at this point
"OK Google you stupid bitch"
...."Here's a matching video"