Remove User from BuddyPress

bp-custom.php

/**
 * Exclude users from BuddyPress members list.
 *
 * @param array $args args.
 *
 * @return array
 */
function buddydev_exclude_users( $args ) {
	// do not exclude in admin.
	if ( is_admin() && ! defined( 'DOING_AJAX' ) ) {
		return $args;
	}

	$excluded = isset( $args['exclude'] ) ? $args['exclude'] : array();

	if ( ! is_array( $excluded ) ) {
		$excluded = explode( ',', $excluded );
	}

	// Change it with the actual numeric user ids.
	$user_ids = array( 13, 24 ); // user ids to exclude.

	$excluded = array_merge( $excluded, $user_ids );

	$args['exclude'] = $excluded;

	return $args;
}

add_filter( 'bp_after_has_members_parse_args', 'buddydev_exclude_users' );