Facebook allows you to choose which types of updates from a friend's profile you'd like to subscribe to:
There is an option for 'Other Activity'. What types of updates are considered 'Other Activity'?
This includes a lot of miscellaneous things that may appear in the News Feed but do not fit in the other categories, such as the person posting to or being added to a group, attending an event, getting new Facebook friends, changing their profile information, being tagged in a non-photo post, or anything from one of their Facebook apps that is not classified as a game/music/video, including cross posts from other networks using e.g. the Twitter/Tumblr/Pinterest apps.
If you're not sure how a particular post about a friend is classified, just press the little