Meta's Ray-Bans can film you whether you're aware of it or not. Rights groups have argued this poses a threat of non-consensual sexualisation, and are taking legal action to ensure regulation catches up to tech.

Editorial: Privacy needs defending against invasive wearable gadgets. So far, businesses are ahead of the government

They were billed as the latest high-tech must have, endorsed by all sorts of celebrity influencers including Kylie Jenner.