The product is _designed_ to be something humans will relate to and "become part of your lives", much like a housepet. Watch Amazon's own intro video narrated by the little girl - https://www.youtube.com/watch?v=CYtb8RRj5r4

At 3 minutes the little girl says "Echo loves to to play music" ... i.e. it's expected that children will project emotions onto Echo, which in turn means an implied level of trust they will have to the device. Also the girl in the video is using at times _without_ parent supervision...

So sorry the whole "it's just a dumb device designed to search the Internet and you should know better" argument doesn't fly here.