Another idea for the UX that I think would be worth considering is to introduce an element similar to the address list in the direct message composer that would make it explicit which people and/or groups are going to be notified:
As groups and users are mentioned in a topic, they’d be automatically added to that list, but could be removed before the post is saved.
How would you assess the pain of implementing something to solve this at this point?
We are planning to roll out support for groups in the near future with the settings described in this topic.
I don’t know we need this yet, but it definitely seems like something that’d be nice to have. I’m a little concerned that people will not feel comfortable using @group mentions because of the constant warnings…