I keep all of that stuff disabled.

> Or when you're visiting friends who have an Alexa device at home. Would that already be a problem for you?

Yes, it is, although I only have one friend who has such a device. I tend not to spend much time at their place. If someone I knew had a wearable that was analyzing/recording everything, and they refused to remove it, I'd minimize the amount of time I'd spend with them.

> I’m genuinely curious where you draw the line.

"Drawing the line" isn't really the way I'd put it. As you say, we're surrounded by surveillance devices and there's little I can do about it. All I do is avoid them wherever it's possible for me to do so and be sparing/cautious about what I say and do when I'm near surveillance that I can't avoid.