emeraldmedia

Try installing Brute Protect. It has a database of blacklisted IPs which have been flagged for hacking and simply denies them access to your site.

Brute protect will act as your first line of defense, blocking access from suspicious IPs. In the event of them getting past Brute Protect, Limit Login Attempts will both slow them dow and notify you.

To slow them down even further you could try adding a captcha to your login screen.

Got it…

$results = array();
if ( ! empty( $user_query->results ) ) {
	foreach ( $user_query->results as $user ) {
		$results[] = $user->ID;
	}
} else {
	echo 'No users found.';
}
$args = array('author__in' => $results, 'post_type'=>'classes'); //Find classes by matched users