[@tharsheblows Participant 12 years, 4 months ago]

If it were me, I’d start by looking through here:
http://www.sourcexref.com/xref/bbpress/nav.html?includes/users/capabilities.php.source.html

and probably try using bbp_set_user_role (starting on line 58) to change the role.

But I haven’t done it, so that who knows if that would work!