Hi David,
You’ll need to customize the buddypress forum page to generate on you requirements. My guess is that it’s using a default forum page which is requesting the default sidebar. You should be able to easily remove this code by modifying files that was installed with the plugin. Look in the plugin folder.
Do contact a developer on this. By default bbpress plugin will use default structures and styles. The default ones will most likely use the twentyten or eleven structure within the plugin template files.
Thanks
