function bbp_spam_topic_replies( $topic_id = 0 ) {

	// Validation
	$topic_id = bbp_get_topic_id( $topic_id );

	// Topic is being spammed, so its replies are trashed
	$replies = new WP_Query( array(
		'fields'         => 'id=>parent',
		'post_type'      => bbp_get_reply_post_type(),
		'post_status'    => bbp_get_public_status_id(),
		'post_parent'    => $topic_id,
		'posts_per_page' => -1,

		// Performance
		'nopaging'               => true,
		'suppress_filters'       => true,
		'update_post_term_cache' => false,
		'update_post_meta_cache' => false,
		'ignore_sticky_posts'    => true,
		'no_found_rows'          => true
	) );

	if ( ! empty( $replies->posts ) ) {

		// Prevent debug notices
		$pre_spammed_replies = array();

		// Loop through replies, trash them, and add them to array
		foreach ( $replies->posts as $reply ) {
			wp_trash_post( $reply->ID );
			$pre_spammed_replies[] = $reply->ID;
		}

		// Set a post_meta entry of the replies that were trashed by this action.
		// This is so we can possibly untrash them, without untrashing replies
		// that were purposefully trashed before.
		update_post_meta( $topic_id, '_bbp_pre_spammed_replies', $pre_spammed_replies );

		// Reset the global post data after looping through the above WP_Query
		wp_reset_postdata();
	}
}