http://www.theguardian.com/technology/2014/feb/18/talking-angela-app-children-safety
Read this article and Talking Angela's alleged dangers are explained. Of course, it doesn't mean that children should be using it without being supervised, but it does help to explain some of the negative hype that has been stirred up about it again.
http://www.theguardian.com/technology/2014/feb/18/talking-angela-app-children-safety