Background: @Telegram has a special position in Iran. Its "public channels" are an important source of news for many low-tech users. Competing services are often blocked, but Telegram makes concessions to avoid this (like setting up local CDNs iranhumanrights.org/2017/07/… ).
Telegram’s Efforts to Increase Download Speed in Iran Raises Questions
Placement of Telegram CDNs in Iran Requires Increased Transparency June 27, 2017—In light of the decision by the messaging application Telegram to use closed content delivery networks (CDNs) —caching...iranhumanrights.org
This is both a good and bad thing. On one hand, keeping people who don't understand and will never learn what Tor and VPNs connected to a big and difficult-to-moderate communications ecosystem is valuable, when the government largely has but two moves: "block" or "not block."
On the other, it means @Telegram will face increasing pressure over time to collaborate with the Iranian government's demands for this or that. Today we saw the communications minister demand a big channel be shut down. And here's where we start getting into complexity.
Should Telegram shut one Iranian channel down to preserve access to all the others? Most would say "of course." It's more important to keep that tether to their ecosystem alive, right? They're in something close to a monopoly position, where the fallback for many is unsafe SMS.
If we presume @Durov is acting morally, this might sound like an argument for Telegram to do whatever they can to keep their Iranian presence alive. But this is unsustainable, which he should know: after all, he was forced from Russia for not doing enough favors at Vkontakte.
And this is where we start getting to my core concerns. @Telegram has for years faced criticisms about the basic structure of its security by prominent cryptographers and technologists. Many defenses rely upon unbroken trust in a central authority (the company). "Trust us."