This study examined people's location privacy preferences through a location sharing application called Locaccino. The study found that location entropy, which measures how many unique visitors a place has, best predicted privacy preferences, with participants more comfortable sharing locations visited by many people. Highly mobile users who visited more unique daily locations had more expressive privacy policies, updated them more often, and found the privacy controls more useful. The type of place also impacted privacy preferences, with more willingness to share public places than private ones, especially among distant social relations.