code: public void deleteUser(final Node user) {
  		Node userReplica, following;
  		for (Relationship replica : user.getRelationships(
  				SocialGraphRelationshipType.REPLICA, Direction.INCOMING)) {
  			userReplica = replica.getEndNode();
  			following = NeoUtils.getPrevSingleNode(userReplica,
  					SocialGraphRelationshipType.FOLLOW);
  			this.removeFriendship(following, user);
  		}
  	}
docs: delete a user removing it from all replica layers of following users
  
  @param user
  user that shall be deleted