Exactly. When you share something, that information is out and you have no control over of it. Plus, why would my friend want to share and then un-share something, or why would I want to do that to someone? The answer is that it is not for the regular people, it is to protect creators and such, not some regular Joe. Telegram is targeting a particular audience with this change. That said, I am pretty sure it will not be successful because I have access to a lot of creators' stuff through the Internet, be it music or books. If people want to save or share stuff, they will find a way.