1. A system, comprising: circuitry configured for receiving at least one indication of at least one transaction conducted at least partially via at least one user device associated with at least one authorized user, including at least receiving at least one location of the at least one user device associated with the at least one authorized user; circuitry configured for obtaining at least one indication of a relation between the at least one authorized user and at least one other authorized user via at least one social networking interaction; circuitry configured for acquiring at least one location indicated by at least one hardware-based position sensor of at least one user device associated with the at least one other authorized user; circuitry configured for determining at least one indication of physical proximity between the at least one authorized user and the at least one other authorized user based at least partially on the at least one location of the at least one user device associated with the at least one authorized user and the at least one location indicated by the at least one hardware-based position sensor of the at least one user device associated with the at least one other authorized user; and circuitry configured for approving the at least one transaction conducted at least partially via the at least one user device associated with the at least one authorized user based at least partially on the at least one indication of physical proximity between the at least one authorized user and the at least one other authorized user, including at least approving the at least one transaction conducted at least partially via the at least one user device associated with the at least one authorized user if the at least one indication of physical proximity indicates that the at least one user device associated with the at least one other authorized user is within at least one approved proximity of the at least one user device associated with the at least one authorized user.