I followed the directions here: http://codex.buddypress.org/how-to-guides/modifying-the-buddypress-admin-bar/hiding-the-buddypress-admin-bar/
Here are the steps I took:
1) Created a file called “bp-custom.php” because there wasn’t one already in /plugins/buddypress.
2) Added <?php define('BP_DISABLE_ADMIN_BAR', true); ?>
3) Saved and uploaded the file to /plugins/buddypress
And nothing changes. The admin bar is still there.
Is there something I missed?