Try that at a playground or public pool!

I think this might be a good ground-roots way to sell the idea of privacy to folks that don't get it.

Buy a cheap phone case or old phone or something that you can have destroyed by an angry recordee.

Walk around in public, obviously holding your recording device out, it doesn't need to be on or actually recording, just the visibility.

Have a sticker on it saying "Ask me about privacy" or something, with a plan to point out the less obvious cameras if anyone does.

For bonus points, target some people who aren't normally aware, like older white men, and help them to understand that it's uncomfortable to be obviously recorded, but that they don't notice when they are "surveilled."

IANAL, I don't think there's any risk other than violence from the recipients, but they're in public after all.

1 person doing this is annoying, 1k people doing this will be notable, 1m will kill public-facing-cloud-storage cameras and their ecosystems. Anyone want to help organize a flash mob to spend a few hours doing this in a city's downtown?

Well in the US it's a protected right in public places and if people assault you for it, self defense laws apply.