Portal Bullhorns - social and academic

The list of events that show up in the social bullhorn is:

profile.wall.item.new
profile.status.update
profile.wall.item.comment.new
profile.friend.request
profile.friend.confirm
profile.message.sent
commons.comment.created

For the academic bullhorn

annc.new
asn.new.assignment
asn.grade.submission
commons.comment.created
lessonbuilder.comment.create

We did originally have an alert for resources, but after we used it amongst ourselves for a while we felt is was more annoying than useful. One of the problems is what was called out: there's no easy way to group notifications after they occur. More broadly, however, why would the instructor necessarily want to call attention to new resources? Wouldn't s/he make an announcement if there's something the students should do?