[Samba] _Truly_ disabling trusted domains?

[Nick]

Is there a way to completely disable trusted domains in samba/winbind?  Some
of the trusted domains are inaccessible to the client machines, which causes
winbind not to work due to all the timeouts/errors.  I tried setting "allow
trusted domains = no", but when looking at the debug logs it's obvious that
winbind is still trying to look them up.  It appears that winbind doesn't
respect the "allow trusted domains" at all.

Does anyone know how to do this?  From my observations it appears that this
is a bug.  I was going to file a bug report, however I wanted to make sure I
did all my research first to see if I'm missing something.