Hi,
Sometimes we may not have any choice but to compromise security feature for particular zone (probably we should not call it 'security zone' then).
And I strongly believe most of the time customers' demand & business cases drive the technology (the only question is who has better foresight, producer/customer ? ) |-:)
Anyway, to conclude this topic there is no such feature in existing ISG to compromise such critical security feature zone basis.
BR,
asmash