We are having a problem with users spamming other users by sharing various content with large groups of users. I saw that you can turn the share ability off for everyone, but we only want to remove the ability from the users abusing the feature.
I don't know if this would help, but in this community and another I frequent I can't share a Jive disc/document with a user if I'm not following that user. I'm not sure if the other user needs to follow me as well for the share option to work.
For example, I'm not following you so I couldn't share this discussion with you and send a more private reply/comment on the topic.