(And hence also on the command-line.) Personally, I would have these messages printed in the PDF/dvi file as well, inside something like \ifdraft ... \fi
so that you can automatically disable the messages in the output when not in draft mode. (Depending on which class file you are using, to do this you may need to add \newif\ifdraft
to your tex file and thenafter which you can turn "draft mode" on and off with \drafttrue
and \draftfalse
).