All:
Any suggestions on how-to, or comments on a potential NFR, to disable
non-superuser's from viewing the database list via \l?
Possibly a postgresql.conf toggle or restrictions on the internal views
that constitute ....say, 'pg_catalog.pg_database'.
Something equivalent, in principal, to FreeBSD sysctl:
% security.bsd.see_other_uids=0
Just a thought...
~BAS