Meta's smart glasses are facing backlash after users record people without consent and share the videos. The backlash has prompted Meta to update its glasses to address privacy concerns, and some places have banned them, adding to the angst surrounding technology that's rapidly evolving. It's too early to tell whether the criticism will dent sales, said Jitesh Ubrani, a director at the market research company IDC. "A headline cycle like this is exactly the kind of thing that could slow momentum with mainstream buyers, even if early adopters don't blink," he said.

The backlash has made some users more wary about where they're wearing the gadget and potential awkward encounters. The 5 Point Cafe in Seattle, which banned Google Glass in the past, has banned Meta glasses from its diner and dive bar. Meanwhile, people are finding new ways to figure out whether others nearby are wearing smart glasses.

Yves Jeanrenaud created an app to alert people if smart glasses could be nearby after learning about people being recorded without their knowledge.