According to this, chatbots in China have been removed after being critical of the Chinese government. This to me is not unlike what happened to Microsoft's chat bot that became racist after being feed racist input from users. If you put AI out there and allow any form of input, then the equivalent of vandals can overtake you AI and feed it whatever they choose. I'm not certain if that was the case in China but I suspect it was.
AI researchers need to expect the worst case use cases if they allow their software to do unsupervised learning on the Internet. If they don't, it's likely that their projects will be a disaster and they will do damage to the AI community in general.