After installing iOS 7 on my iPhone and my two kid's iPhones, I was very disappointed to find out that iOS7 now disallows one to enable "Find My iPhone" on a secondary iCloud account. Our family setup was to have a "Family iCloud account" that everyone shared. This account was primary on my device (setup under iCloud settings) and secondary on everyone else's device (setup under Mail, Contacts, and Calendars). That way we shared one Contact list (each person has their own group), one Calendar (each person has their own iCal calendar), and most importantly, "Find My iPhone" was enabled under Mail, Contacts, and Calendars for the kids. With this setup I was able to go to Find My iPhone and see where each family member's devices were at any time, all in one view, and they were able to do the same. Now I will need to either setup "Find My Friends" for everyone and they will need to do the same, or we will all need to login to each others iCloud accounts (not good) to check device locations. We can still share a common Calendar and Contact list, but there is no longer the ability to see ALL family members device locations in one "Find My iPhone" view. I understand that this was probably done in conjunction with the new security features included in Find My iPhone, but I'm not happy that this new "feature" had to come along with the security improvements. This is definitely a step backwards in my judgement.