Man, I was trying to avoid the grand-statement effect by calling myself a quack, truly yours, but you called it. OK, well, I think being death prone helps:

• the module author by making the module code simpler
• the user in the long term by forcing him to be explicit about what he wants to do with the errors
• the user's user by making it likelier that the user will provide his own error messages, which will probably make more sense to the user's user.

I am here to learn, though, not teach, which I couldn't even if I wanted to, so I am eager to hear your response, shmem, and those of other wise monks. Cheers.