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Telegram Reportedly "Ready to Fight Piracy" According to Govt. Official * TorrentFreak
(torrentfreak.com)
At various times, most social media platforms have received criticism for alleged failure to prevent distribution of copyright-infringing content. Few, however, have been threatened with widespread blocking more often than Telegram. In a row that seemed ready to boil over last year, Telegram was given an ultimatum by the Malaysian government; come to the negotiating table or face the consequences. A Malaysian minister now says that Telegram is ready to fight piracy.
Which one is harder has zero relevance upon how much work Signal has to do to vet the contents transmitted on the channels, which is zero, nil, because they can't. Even if it was Charlie who reported the channel, Signal intentionally has no practical means to verify neither the accused contents nor the authenticity of the report. And this is actually good.
Infrastructure-wise, Signal (mostly) limits itself to only being a carrier. In a just world, a carrier who has been set up to take the limited responsibility of a carrier is not liable for the contents of carried things that are protected so that the carrier can not peek into. Sure, they can be legally pressed to change that and "upgrade" their lawyer plan to "content vetter", but as far as I know that hasn't happened yet.
I don't get what you're trying to say at all. If a party is in a group chat and reports it, they can provide their credentials to Signal to enable Signal to view the contents of the chat.
Yes, they're a carrier that does not know the content of what they carry. But once they are made aware, the legal system considers them to now bear responsibility if they don't take action. Whether or not that's fair is a pretty large topic, though I'm inclined to think so myself.
And the action Signal can take is pretty clear: "Okay thanks for reporting, feel free to file a lawsuit against Alice and or Bob instead, have a nice day." Remember: even if Signal had Charlie's credentials to view the chat, unless Charlie is an admin of the chat Signal can't do anything other than log Charlie off the group. Plus each participant still has their own message store. So by this point Signal has complied with the law. It's literally Section 230.
Not sure why you're citing US law when we're discussing foreign govts. Also the obvious thing signal can do, that most complainants would probably expect as a minimum, is banning their accounts and closing the group.