Whenever I visit people's home, I always ask if they have an Alexa or Google speaker. This prompts them to ask why and I respond with I prefer if it is unplugged while I'm here, otherwise I have to be very careful of what I say. This usually starts an interesting conversation. They always unplug it for me. It's also not controversial because I don't start out with it's spying on us or anything. It gets them thinking about something they hadn't considered.