So it's really a zero exceptions, except for the ones you deliberately choose to ignore policy. But that's pretty much what we do now, except I'm not aware of a good method for muting certain exceptions. (There may be one! It just never occurred to me that we could mute certain exceptions.)
I think we could take it a step farther and say certain kinds of exception should never occur and should also never be ignored, like NoMethodError / nil pointer exceptions.