1. A method for facilitating multi-user computer interaction, comprising: automatically determining a first set of content items for a home screen of a first user of a data processing system, based at least in part on a user profile for the first user; automatically determining a second set of content items for a home screen of a second user, based at least in part on a user profile for the second user, wherein the first user and the second user are individual users; automatically determining a third set of content items for a home screen of a family user, based at least in part on a user profile for the family user, wherein the family user is a collective user; enabling the first user to change settings in the first user profile; protecting the first user profile from changes by the second user; enabling the second user to change settings in the second user profile; protecting the second user profile from changes by the first user; enabling both the first user and the second user to change settings in the family user profile; automatically updating the user profile for the family user, based on a change to the settings in the first user profile; presenting the first set of content items on the home screen for the first user in response to the first user is signing in; after presenting the first set of content items on the home screen for the first user, automatically determining whether the first user has handed the data processing system to another person without signing out; in response to determining that the first user has handed the data processing system to another person without signing out, automatically determining an identity of the other person and automatically presenting a transfer interface that provides at least four different transfer options, wherein the transfer interface enables the other person to select and complete any of at least four different transfer options with no more than a single gesture of a single finger, wherein, when the other person comprises the second user, the at least four different transfer options comprise: a no-transition option, to cause the first user profile to be kept open, a complete-transition option, to cause the first user to be automatically signed out and the second user signed in, a temporary-transition option, to cause the second user to be temporarily signed in without signing the first user out, wherein the temporary-transition option, when selected, allows the second user to send content from an account for the second user to an account for the first user, and a shared-transition option, to cause the data processing system to make content recommendations based on both the first and second user profiles; and if the temporary-transition option has been selected: automatically determining whether the second user has handed the data processing system back to the first user; and automatically signing out the second user while leaving the first user signed in, in response to the determining that the second user has handed the data processing system back to the first user.