1. A system for implementing security in social applications, comprising hardware processing resources communicating with hardware memory resources to implement: an inference engine to determine a closeness score, based on a closeness policy, between a first user having a user's profile on a social application of a social network and a second user having an existing network connection in the social application to the first user; a security implementation engine to implement a security level individualized to the second user based on the closeness score, the security level dictating a corresponding set of security mechanisms to be applied to network communications received by the first user from the second user; a monitoring engine to monitor communications between users of the social application; an adjusting engine to adjust the closeness score in response to monitoring of the communications; and a removing engine to determine whether to remove a connection between the first user and the second user within the social application based on negative behavior of the second user identified by the monitoring engine; wherein the removing engine to receive input from the first user specifying different classifications for other users, wherein the removing engine determines whether to remove a second user from connection with the first user based on the negative behavior of the second user and a classification of the second user.