I think they should show how long a friend has been offline, eg like
Camgames1256
Offline: (45 Mins)
Or, if more than 1 year Offline, its says:
Camgames1256
Offline
Camgames1256
Offline: (45 Mins)
Or, if more than 1 year Offline, its says:
Camgames1256
Offline