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
Good news! This plugin is FREE for everyone and released under the GPL, so you can use it on your personal or commercial blog. Obviously, you are responsible for how you use it and the plugin comes without warranty.
No donation request needed either... If you have your own business and fancy reading some cool psychology stuff to help you grow that business, then visit my small business blog and that'll be thanks enough!