Good breakdown. But I don't understand why any company thinks it is ethical to ever listen/record/send home data from -inside- a home. There are a plethora of public, or semi public places they could use to obtain real conversation(think of a subway, restaurants, DMV, etc). Set up a booth and let people talk to it. Using real speech from within someone's private quarters is disturbing IMO.
I dunno if I agree with you assessment, if you buy a device that purposefully made to record your voice and send it to a company, I wouldn't find it unreasonable that the company could listen to what I sent to them. It's not like they are being sneaky about when it is recording or where the recordings are going.
