What's stopping people from accidentally ordering things with this thing? Could I go into somebody's house that has one of these devices setup and say "Alexa, order some breast clamps" ?
The "security" is the you have to trust the people you invite into your house.
It's not great security. :)
(ok, that's not entirely true. as far as I can tell, you can only reorder things they've already bought via the website)
http://www.howtogeek.com/237386/how-to-enable-disable-and-pi...