"default deny" for roles

Folks,

There are situations where a "default deny" policy is the best fit.

To that end, I have a modest proposal:
   REVOKE PUBLIC FROM role;

Thenceforth, the role in question would only have access to things it
was specifically granted.

What say?

Cheers,
David.
-- 
David Fetter <david@fetter.org> http://fetter.org/
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