[Zope] disable login

[philrobinson]

Anyone know a neat way disable login?

I want to stop people logging in so I can
upload new versions and stuff without them
editing content while I'm at it. 

I can log in at a higher level than they can; a
 general method for programmatically making
parts of the ZODB tree effectively read only  is
what I'm after.

Thanks for any ideas
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Phil Robinson.
philrobinson@ponytrot.net
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