I agree that it would be even better to host the server software myself. However, I conclude that telegram 1. isn't SaaSS 2. doesn't require non-free software to be executed on my computer 3. offers end-to-end encryption
so from a privacy and freedom point of view, I don't see any problem here. Since the client is free software, I trust the community to make sure the encryption is really safe.
Besides, what I've seen so far from telegram is excellent. It's basically a free version of whatsapp, which is awesome.
