function bp_activity_ham_all_user_data( $user_id = 0 ) {
	global $wpdb;

	// Do not delete user data unless a logged in user says so.
	if ( empty( $user_id ) || ! is_user_logged_in() ) {
		return false;
	}

	// Get all the user's activities.
	$activities = bp_activity_get( array(
		'display_comments' => 'stream',
		'filter'           => array( 'user_id' => $user_id ),
		'show_hidden'      => true,
		'spam'             => 'all'
	) );

	$bp = buddypress();

	// Mark each as not spam.
	foreach ( (array) $activities['activities'] as $activity ) {

		// Create an activity object.
		$activity_obj = new BP_Activity_Activity;
		foreach ( $activity as $k => $v ) {
			$activity_obj->$k = $v;
		}

		// Mark as not spam.
		bp_activity_mark_as_ham( $activity_obj );

		/*
		 * If Akismet is present, update the activity history meta.
		 *
		 * This is usually taken care of when BP_Activity_Activity::save() happens, but
		 * as we're going to be updating all the activity statuses directly, for efficiency,
		 * we need to update manually.
		 */
		if ( ! empty( $bp->activity->akismet ) ) {
			$bp->activity->akismet->update_activity_ham_meta( $activity_obj );
		}

		// Tidy up.
		unset( $activity_obj );
	}

	// Mark all of this user's activities as not spam.
	$wpdb->query( $wpdb->prepare( "UPDATE {$bp->activity->table_name} SET is_spam = 0 WHERE user_id = %d", $user_id ) );

	/**
	 * Fires after all activity data from a user has been marked as ham.
	 *
	 * @since 1.6.0
	 *
	 * @param int   $user_id    ID of the user whose activity is being marked as ham.
	 * @param array $activities Array of activity items being marked as ham.
	 */
	do_action( 'bp_activity_ham_all_user_data', $user_id, $activities['activities'] );
}