Is it possible to have a private messaging app that can protect most people from the government, except for pedophiles?

Total noob here. I have a friend who's becoming a crypto/privacy enthusiast, and he was talking to me about potentially untraceable messaging systems. I told him that I was concerned about it becoming a platform for CP dealers and child abusers to share their videos. He told me that there are other forms to combat this, but he doesn't know exactly how.

That makes no sense to me. I can't comprehend how a messaging software could simultaneously not collect any …

app government messaging messaging app people privacy protect