Privacy, schmivacy; I think this discussion really misses the whole point.  These two individuals ( I won't use the term "men")  willfully mocked two young students.  Whether they used social media, whispered to each other, or wrote it on the wall of a service station's mens room, is irrelevant.  The real question is, do we want people with this mind-set in charge of the education of our children?
I don't.