Product idea: make cinema screens harder to record with phone cameras

Product idea💡

As someone who loves movies and goes to the cinema regularly, one thing always comes to my mind:

Piracy inside cinemas is still a real pain.

You see the warnings before the movie. The anti-recording messages in hallways. Staff trying to monitor it.

But I keep wondering…

Is it technically possible to make cinema screens harder (or even impossible) to record with phone cameras, while keeping the experience perfectly normal for the human eye?

A bit like how some apps block screenshots and return a black screen.

Maybe something at the projector/display level?

What do you think? Any input?