FB's "crime" is painted as data security. The "criminals" are trump, Bannon, Putin or whoever is alleged to have used this data to "manipulate public opinion." This misses the entire point.
FB's business model is based on using large datasets of mundane (in isolation) information in order to "profile" people. More specifically, score people for likelihood to do X, where X is refinance a loan, go to a diet seminar or whatever an advertiser wants.
The key point is large quantities of mundane data, not necessarily stuff that is protected.
Someone got a hold of a small subset of FBs dataset and presumably used it to target political messages or whatnot.
This is exactly what all FB advertiser's do every day.
If we're calling this incident "manipulating public opinion" or "foreign meddling"... Then the problem is 10,000X times bigger than this case. This stuff is all around us.