It has been reported on Mashable that Facebook is testing a new stalker alert system.
Basically the new subscription service would notify users anytime a specific friend does something on there profile.
Facebook have been reported to say
This feature is being tested with a small percentage of users. It will let people subscribe to friends & pages to receive notifications whenever the person they’ve subscribed to updates there status, pictures or any new content.
Personally I cannot really see the benefit of this. You have a timeline already of the people you are friends with and if someone does something interesting you generally go straight to there profile.
If you are 1 of the people that has this option and use it let other readers of this blog know your thoughts.