The problem with the social sciences, and especially psychiatry, psychology and economics, is the massive amount of influence they have over public policy. They may have good and repeatable studies that completely contradict each other, from which politicians and appointed officials then cherry pick the studies that align with their viewpoint. Don't like social welfare because of your Protestant values? Lets go with the Chicago School economics. Control freak? Lets justify increased economic control with Keynesian economics. Bigoted against Homosexuality? Let's not forget that it's a "paraphilia". We mustn't forget that moral preconceptions can and do constantly reflect in the conclusions drawn from the social sciences, far more so than any other academic area.
Perhaps we should add another dimension to the categorisation of sciences alongside the soft/hard category; hot/cool, as in headed.