Make members of a group watch a category by default

Interesting idea!

There’s a similar topic here, but your request is a little different since that is about site-wide defaults. Still, worth reading through that topic if you haven’t already.

Your idea could also be an approach to fulfill this request, by having an ‘announcements’ category that everyone is set to watch by default:

https://meta.discourse.org/t/notification-options/21694?u=mcwumbly