Now, are you curious as to what I said originally ? :-)

If you create a new database as Person A (or sysdba), Person B can still
log in to that database even though they do not have any permissions to
select any data or anything. They can then extract the meta-data and
create an empty copy of the database (copyright theft).

This means that IB is no good for ISPs. Especially for unimaginative ones
who would create your DB in a predictable manner
(c:\users\databases\domain\database.gdb for example).

Borland probably just did something to what MS SQL does, if you have no
permissions in the database at all then it refuses connection to that database.

Tadaaaaaaa :-)