For MI: In addition to "add me" on the portal, the ability to select to merely "follow" that would effectively add the person as a stakeholder with a specific profile of "follower", and nothing more.
A New Widget allowing users to see KE, Problems, MI or any other entity marked as "Public to portal", or "Global" for example with a Follow button next to each. You could also consider restricting by Organization
the ability to follow KB content.
the ability to follow CI (this is relevant to PPM)
Why: People might want to follow the issue or thing to get notices, but not actually have a call logged for it because they may not be directly impacted. We wouldn't want them in the counts anyway. Its a social media thing... like threads from back in the day.