alt Hacker NewsIs it a “bad reason”? Millions of people chose to use Snapchat specifically because of how it handles screenshots. It is a feature even if you don’t like it.
Many people would find it inconvenient to find another device to take a picture with. And that manual picture would then have baked-in evidence that it was taken surreptitiously.
Locks keep honest people honest, as long as the app is up front about it and lets users make the choice, I don’t mind.
I said 90% and not a higher number because of Snapchat. It's not the example of bad reasons.
Nobody deliberately opted in to random information hiding in a more general purpose app, or watermarking, or DRM.