I had this disabled, but I enabled it last night.
Friends enable you quick access to members you communicate with frequently. If the template has relevant support any posts made by a friend may be highlighted.
At the moment, I'm pretty sure that this template does not support highlighting friends posts. It might at some point in the future. I wouldn't hold my breatheFoes are users which will be ignored by default. Posts by these users will not be fully visible. Personal messages from foes are still permitted. Please note that you cannot ignore moderators or administrators.