[@jason_jm Member 15 years, 5 months ago]

The plugin is required because it will call functions to clear your bbpress login cookies. It will also be called to create your bbpress cookies (cookies with paths that = /bb-admin, /bb-plugins, /my-plugins). Without this these will not get created.

These cookies allow you to enter into the admin/dashboard of the user in the respective app.

Which is pretty much the entire point of integration plugin.