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Let me comment on this instead:
Under most circumstances, Yahoo! will not manually remove sites or pages from the index as we do not have the means to verify the validity and authority of each request.
That's silly. You could easily have someone add something to their robot.txt and let them request a re-check (for removal only) or place a text file in the root of the domain like Alexa does for info verification.
Since Yahoo provides a cache of pages, I would think legally you have to provide a reasonably quick way to remove such information (like Google and WayBack does) or risk lawsuits eventually.