An optional errors mdi somewhere sounds like a nice idea to me, in such a case an option like 'show errors in...' with dropdown 'Status or Active (or whatever it does now) only', 'error window only', 'both' or something to that extent should come with it.
My personal opinion is simply that there should not be a scriptable way to disable/change mirc internal error messages. Changing where they are shown is perfectly reasonable. If such a feature is implemented, i wouldn't see a problem with being able to capture (if it cant already be done) the messages to display them how you like, so long as they are still displayed in the unaltered form in the specified location (hidden mdi that open with /errors for example).
