Glad to see that she's being forced to step down after such an egregious invasion of privacy. But that's just a school. The much more important case is whether anyone in the federal government gets punished when they do the same thing without a warrant. So far, it doesn't look like it.
The Dean of Harvard is stepping down not because there is anything illegal about her searching through the e-mails of faculty (your employer has every right to search your work e-mail), but because it was in bad taste in an academic institution which made the Dean ineffective as a figurehead. Similarly, there is nothing definitively illegal about the federal government asking Google to voluntarily hand over your e-ma…
As you suggest, we rely on 'good taste' from both our employers and our governments.
Is there some way to define good taste, which can be applied in court.. do I have some legal recourse if my government acts in bad taste ?
It seems that the legal system has evolved over the years to be our best attempt to scale and codify the idea of 'good taste'.