> they behave differently only when all listeners are unloaded.
   > in that case i'm not sure what's a desired behaviour.
   
   Question is this: after listeners *are* loaded, and then *unloaded*,
   and we end up with a system that used to have them but now don't --
   do we want to give someone a chance to fix this, or remain
   dysfunctional?


if someone breaks their system like this, i think that is their
problem.  we want to fail closed and this seems the best way.


.mrg.