Comment by another-dave

I think your point is a little black-and-white — there's tons of behaviour that sits in the "technical possible but frowned upon" bucket.

It's like people listening to music without any headphones on the train — technically has been possible for ages but previously would've gotten you told to turn it off. Now it barely gets a raised eyebrow.

Can you prevent people secretly filming you? No, but most people still don't want it be become accepted behaviour, even if to you that's all just "whining and blathering".