The scary thought from black box hi-tech policing like this is that you don't know what little things you said/did that made the algorithms think you're bad or

The scary thought from black box hi-tech policing like this is that you don't know what little things you said/did that made the algorithms think you're bad or worse a target. What if there is a bug(and there will be) in such predictive analytical tool? A swat team watching every move of a guy going to get groceries?