How dumb do people have to be to call SpyWear™ “Smart Clothes”? Sure, it doesn’t HAVE to be that way, but unless folks make sure their data is kept locally, more than just air-gapped from the web, their private info. . . isn’t. I do use a fitness tracking device that coordinates with an old phone that is disconnected from _any_ network (including my local network). I can evaluate the data collected, so I get the benefits w/o “sharing” my data.
BTW, yeh, all the apps I have on that old phone do gripe at me, wanting network access, when they fail to phone home. I just smile and enjoy those gripes. (And yeh, I don’t just rely on disconnecting it from my network. I have it blocked at my router. 🙂 )