The WordPress Admin Bar has its uses... but not all users/roles need to see it. This plugin allows you to set who sees it and who doesn't
Allows the user to remove the WordPress Admin Bar from their sites.
The admin bar can be removed entirely or left on for different class of users
So for example, you may want "admin" to see it but no-one else.
Operation is simple.
1 - Just go to the "Settings" tab and select "Goodbye bar"
2 - You will have a list of checkboxes, now select which users you want to see the admin bar.
3 - Click "Goodbye Bar!"