I do as well. I used to politely ask they unplug it, bit invariably there were more in other rooms. I just explain my concerns, and avoid those people if they cannot grasp or honor them. So far it seems a good strategy, as I have doged a few 'bullets' both security-wise and socially.

Yeah, I'm extra happy I have my Amazon Echo now, if it also works as a way of preventing paranoid conspiracy-theorist lunatics from interacting with me!

If there is one thing you could have learned from the post Snowden era it is that your paranoid hacker colleagues may (1) know more than you do and (2) tend to be right in the longer term about what you today consider to be ridiculous lunacy and (3) usually are still too mild in their delusions compared to reality.