You can't disable concealment because this feature is required to comply
with the computer database privacy laws of some countries. We don't want
to have to make several versions of LISTSERV based on the country, and
above all we don't want to have to pay lawyers to do research in 47
countries. You can always modify the software, in which case we are
clearly not liable and everyone is happy.
You can establish REPRO as the default option with:
* Default-Options= REPRO
Eric