Hi, German here. How about not storing any information at all? Nothing to give, problem solved. Just like Signal. I seriously don’t understand why people use Telegram instead of Signal. Any reason! The app doesn’t solve any privacy problem, default chats are unencrypted, keeps personal info. App should be dead already or turned into a dating app because it’s clearly not seriously privacy fucused.
That wouldn't work for groups. Abusers could then destroy the groups with impunity for the purpose of censorship. Telegram is mostly about groups. Telegram is often used for activism.
Signal claims to not store data about who is talking to who. That doesn't mean that they don't. If they were, say, a secret subsidiary of the CIA they would act exactly as they are acting now. In general you can't trust the providers of these sorts of things. See Crypto AG...