There is no definitive test. Its not like there is a blood test or scan. Second where is the proof that 100% of people that met the definition would go on to harm? The whole concept of better to set 10 guilty free than condemn one innocent is pretty damn important. I wouldn't be surprised if you met some criteria for something harmful or related to criminal activity, should we incarcerate you just to be safe? What's next? Eugenica?