I also went and got Google's official comment: "For the privacy of those involved, we don't discuss motivations behind account suspensions but we are confident in our actions in this case."
I'm sorry that I can't go into more detail.
[1] http://www.reddit.com/r/google/comments/it8ah/when_google_de...
I'm sure your response seems reasonable to you, since you are familiar with the details, but try to understand what it looks like from the outside. Personally, once the Apple cloud is up I'm moving all my important data away of Google.
The only thing that might be nice, besides some personalized review of hard edge cases, is to allow users to export "untainted" data, if it can somehow be isolated. E.g. if one gallery was flagged, still let him export his uncontroversial email archives.
If there's no way to answer that question without compromising his privacy, can Google at least share its policy on data liberation in situations such as this, and publicize it broadly via the Data Liberation Front?