Is asking to see Obama's college transcripts an unreasonable request?

No, it's not unreasonable at all. I can think of no reason for Obama to want them hidden other than the fact that he honestly did not have the grades to make it into Harvard Law. However we already know that based on the fact he graduated from Columbia with no honors whatsoever. You see, as much as he doesn't want America to know anything about him, he couldn't change the fact that graduation honors are published publicly. So either he got into Harvard Law through Affirmative Action or was a Legacy admission, and we already know he doesn't qualify for one of the aforementioned categories.