WordPress stantard bar – Remove it !

The WordPress 3.2 has a bar as standard for users of the site, but would like to remove it.

I managed to remove the administrators of the site, but it continues to subscribers visible.

I added the following code in functions.php:

add_filter( ‘show_admin_bar’, ‘__return_false’ );

function maist_hide_admin_bar_settings() {
?>
<style type=”text/css”>
.show-admin-bar {
display: none;
}
</style>
<?php
}

function maist_disable_admin_bar() {
add_filter( ‘show_admin_bar’, ‘__return_false’ );
add_action( ‘admin_print_scripts-profile.php’,
‘maist_hide_admin_bar_settings’ );
}
add_action( ‘init’, ‘maist_disable_admin_bar’ , 9 );

?>

How to remove all types of user of the site?

Sry my english,

Thx! ??