Group Mentions and other Activity Notifications

One awesome addition to this plugin (or maybe a separate plugin entirely) would be if you could @mention a group name and have that automatically email everyone in the group to say hey someone has mentioned a group that you are a member of. Maybe an option to subscribe to group activity updates (not sure if this is already available) but mainly the option to mention a group anywhere in the site - thinking mainly of the main site activity feed - and have an alert go to all users.

For example - you could post a comment in the site wide activity to say hey Braden check this new post with details about such and such. Heaps easier than doing an email to all the members of the management group