Active ear protection become passive when the batteries fail. The active part is that they have microphones on the outside so that you can hear normally with them on. I do agree though that noice cancelling headphones should not be used as hearing protection.

Zero g is only available in special airplanes and in space, so not much of a worry for most people.

I bought some TP link Kasa plugs and a couple of years later when I wanted some more the Kasa brand was discontinued and replaced by Tapo in Sweden. Tapo and Kasa only work with their own separate app so I would have had to have two separate apps even though both were TP link. Never bought any more smart plugs.

Iain M. Banks - Surface Detail has a really fucked up version of that concept in it.