While we might not be able to prevent screenshots from being taken, the next best thing is to probably at least let the other person know that a screenshot was taken. If you use Facebook Messenger, you might be interested to learn that in the latest update to the app, if a disappearing message was screenshotted, a message and notification will be sent to let the other person know.
This is according to Meta’s CEO Mark Zuckerberg who made a post on Facebook talking about some of the changes to Messenger. According to Zuckerberg, “New update for end-to-end encrypted Messenger chats so you get a notification if someone screenshots a disappearing message. We’re also adding GIFs, stickers, and reactions to encrypted chats too.”
The screenshot notification is just one of the few changes Meta is making to the Messenger app, where they have also announced that end-to-end encryption for group chats and calls will now be available to everyone following a test back in 2021.