WP: pingbackの停止（？）

function.php

/* ==================================================
pingbackの停止
================================================== */
function remove_x_pingback($headers) {
	unset( $headers['X-Pingback'] );
	return $headers;
}
add_filter( 'wp_headers', 'remove_x_pingback' );

function remove_pingback_method( $methods ) {
	unset( $methods['pingback.ping'] );
	unset( $methods['pingback.extensions.getPingbacks'] );
	return $methods;
}
add_filter( 'xmlrpc_methods', 'remove_pingback_method' );

Can also be a drop-in plugin ;) Forked with added lines.