This is what all the civil liberties peoples feared: you make a big pot of juicy data and unilateral executive powers, and it invites expanding their uses and mis-uses. The misuser may be GWB, Obama, Trump, HRC, or the next guy, but because they exist they will eventually be mis-used.
It may be rank hypocrisy for everyone to freak out about it now, but I welcome people getting freaked out about it.
That said many fewer people seem to trust Trump and he is an unknown quantity, so it's easy to see why the freak-out exists even if in principle it was late in coming.