1. A computer-implemented method of executing operations in a social network application, the method comprises: registering users with a social network application communicatively coupled to a repository of facts as a service, wherein the registering includes providing to the social network application user identifiers recorded in the repository of facts; for each user, configuring and storing in a repository coupled to the social network application: a set of verification parameters enabled to filter the participation of the respective user identifier in a set of operations; initiating, by a querying user, an operation through the social network application, wherein: (a) querying the repository of facts to locate attested-to facts specific to: a user identifier of the querying user or the user identifiers of the registered users; and (b) filtering participation of at least one of the user identifiers in the operation based on the located attested-to facts meeting the stored verification parameters; and executing the operation in accordance with the filtering, wherein, if the operation includes at least one operation parameter, returning operation results based on the located attested-to facts meeting the at least one operation parameter.