yusufmudagal

For developers, the toolbar can slightly throw off a theme’s design. The toolbar is just distracting. Here is a plugin which helps to hide the the admin bar.

Disable Admin tool Bar

Hide the Admin tool Bar in WordPress 3.1+

michaeltyson

Specify a list of tags or categories to keep hidden: These will no longer appear anywhere 
on the site, such as in the tag cloud or on the list of post tags. This is useful when using 
tags to control behaviour of your blog with other software, or when you wish to maintain 
groupings of posts out of the public eye.

Hidden Tags

Hide certain tags/categories from the public

Disable Admin tool Bar vs Hidden Tags