The recent NSA scandals seems to have put me in full tin foil hat mode. All I read here is: "We record everything you and/or your child say and send it to our servers."
It would not be evil, if they made the software independant of the cloud, but I suspect they cannot due to a) the amount of data+processing speed required or b) in order to bind their customers.
An evil teddy bear could subvert your kid to murder xyz, let your parents buy xyz or do other things. That's why all highly intelligent AI robots in Films are independent agile forces and sometimes even able to additionally connect to the hive (collective mind), but they very rarely operate on the command of the hive (exclude the borg, they ought to be like Seven of Nine).