BuddyPress.org

Did you read the link posted by Avi M?

The BuddyBar and the WP Admin bar are two separate things at the moment.

The WP admin bar was introduced in WP 3.1.

BP_DISABLE_ADMIN_BAR only disables the BuddyBar (contrary to the blog post on bpdevel.wordpress.com).

To disable the WP admin bar, you can simply add the following in your theme’s functions.php:
`add_filter( ‘show_admin_bar’, ‘__return_false’ );`