> The best thing he can do is stay, serve his sentence/pay his fine, and improve Telegram to have e2e encryption by default (or better yet, mandatory)

That would compromise the feature of open-to-everybody groups right? Right now I can download telegram on my phone, do a quick search and view an open group where local drug dealers post their wares (with pictures), weapons are being sold illegaly, etc. I always thought this was the "illegal content" they were referring to