Some of the new “smart devices” in IOT family were used to cause massive website outages recently.  IOT Security will likely be improved in future to prevent or reduce impacts. 

http://www.nytimes.com/2016/10/25/technology/daily-report-hackers-have-new-tools-to-bring-down-websites.html

The bad news? Hackers also have new tools to take those sites down. Friday morning, Dyn, a New Hampshire company that hosts critical portions of the internet’s infrastructure, was hit with so much traffic that its servers were overwhelmed. The attack caused sporadic disruptions at sites like Twitter, Reddit and The New York Times.

It is too early to say who did it. But security experts are concerned about how they did it: using a vast, co-opted collection of internet-connected devices, like cameras and perhaps even baby monitors, in what is called a distributed denial-of-service attack. Experts have been warning for some time that everyday objects with internet connections, the so-called internet of things (IOT), could be used in such an attack