BTW, there are several "reserved" topics:

ALL
OTHER
NONE

On one of the lists that I operate, we discourage the use of OTHER since
that is the catchall one -- miscoded or non-coded topics fall into that
trap.  Instead, we have added an explicit topic of MISC which serves as
an area that does not fall into the any of the defined ones.  Our
list-header includes:

DEFAULT-TOPICS= ALL,-OTHER

Pete Weiss