Oh look the thread is back!
In any event, could someone explain in a one-liner why this is so important? Surely any rights to privacy on a discussion forum on the internet is barely tenable at best?
Because many of those channels are invite only, not public.
There is certainly a possibility here that if what is accused is real, then data protection or other laws have been broken. It would require someone with the right legal background though to determine, and generally speaking, that doesn't include the ED community.
The legality of what was done is best left to Discord's legal and security teams. If there is any action to be taken then, they can best advise. Either Discord would then prosecute themselves, or if there is grounds for a class-action or similar by those affected, then they can provide whatever legal advice is required to the parties affected.
My best guess though is that Discord will do what they can to sweep this under the carpet, review their systems to stop similar things happening again, and possibly issue bans against those who were responsible.
Time will tell i suppose.
On the non-legal front, those responsible might find themselves shunned in the community, especially by those affected.
I'm not certain FD have anything to do here, as Discord has nothing to do with them.