Fred wrote (2020-11-16):

 FR> Hello Oli!

 FR> 16 Nov 20 11:31, Oli wrote to Fred Riccio:

 O>> What about the users of those echos? Did they give their consent,
 O>> that their messages are stored on Telegram servers (and to
 O>> Telegram's ToS and privacy policy)?

 FR> The moderator, who was elected by the users, will speak for the users.

moderators are not always elected and this is not how privacy laws work. you
cannot give consent for other people just like this.

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