1. A method preventing incorporation of data entries by a third party to a user's own user profile, including: maintaining at least one trust object linked to fields of a user profile on an online social network, wherein the trust object holds audit trail fields that identify how data became incorporated in at least some fields of the user profile including names of data sources, interface categories of the data sources, and origins that identify geographic locations of the data sources; and access control fields that specify field-by-field and party-by-party control over third party data incorporation to the user profile fields including identifying a user's engagement preferences, a connection type of the user with a third party, statuses of data streams from third parties and information identifying the third parties; providing a privacy controller, wherein the privacy controller provides user access to information in the audit trail fields for user's own user profile; and provides user control on a field-by-field and party-by-party basis over third party data incorporation to the user profile fields; receiving instructions that set user's preferences for field-by-field and party-by-party control over the third party data incorporation to the user's own user profile; and updating the trust object responsive to the received instructions and using the updated trust object to automatically prevent incorporation of data entries by a third party to the user's own user profile of the online social network according to one or more of a source, a type, and an origin of the third party identified from the information.