My privacy settings are set to share all information with everyone:
https://connect.garmin.com/modern/settings/privacy
When I'm viewing my Daily Summary, I even get confirmation that the information is unlocked (public):
https://connect.garmin.com/modern/daily-summary/KyleMit/2016-04-13/timeline
But when I give someone else the link, or click Share, they are unable to view the information:
https://connect.garmin.com/modern/daily-summary/KyleMit/2016-04-13/timeline#.Vw-jae1hoKs.email