Here's how Discord works. A third or so of its features, such as forum channels (EDIT: I think this specific example was wrong; stage and announcement channels, but not forum channels) or role self-assignment, are locked behind Community Mode. After enabling Community Mode, server owners are NOT ALLOWED to turn off content filtering anymore, meaning that by default, content in every channel may be filtered out by systems you cannot configure.
The only way for the server owner to circumvent the filter is to mark a channel as "NSFW", which doesn't necessarily mean the channel actually contains any NSFW content.
This change will not actually require ID for content confirmed to be NSFW. It will require ID for each and every "NSFW mode" (unfiltered) channel. The end result is that you have three choices:
- Ditch Discord features implemented in recent years (or at least this is currently possible) - this prevents a server from being listed as public;
- Require ID checks from all your users (per channel);
- Have everything scanned from all your users (per channel).
Are you saying that you can "mark" the channel as "NSFW", and Discord will stop scanning your content, possibly allowing you to share very illegal content through their servers?
Sounds weird to me. Pretty sure that they legally have to make sure that they don't host illegal content. Or does "NSFW" enable some kind of end-to-end encryption?