ofcourse it is now visible. which is good. so removing it would not be good. even if bind has built into it older or latest hint.
Received from John R Pierce, on 2013-02-20 1:20 AM:
On 2/19/2013 4:35 PM, Bry8 Star wrote:
they can do so bit easily if the old one is visible.
whats not visible about /var/named/named.ca ? its even listed in /etc/named.conf as the root zone.