[fel64]

This means their bbpress login will mysteriously fail.

No it won’t. No matter what cookies users have, they will not prevent them logging in.

schmitt, must say I really liked your site. Not at all interested in things financial but it was engaging nonetheless.

You could put these lines at the top of your bb-login.php:

header('Location: http://www.example.com/');

exit;

Obviously changing the URL to that of your wp-login.php. I don’t know how else you’d do that. This may have all sorts of crazy adverse effects because I haven’t tried it myself; maybe ck can say how he did it?