OMG! Artificial intelligence chat bots have created a new language that a human cannot understand.

https://www.androidheadlines.com/2017/06/facebooks-negotiation-ai-created-an-entirely-new-language.html

When machines can talk to each other in an alien language, humans won't be able to control machines anymore because humans cannot understand the linguistic logic.  This is very dangerous because machines will rule over humans or even destroy humans in the future.