The law is not infallible, the law is not beyond making mistakes, and those that believe otherwise take naivety to a whole new level, Unfortunately society is full of such people and that makes certain elements of society very dangerous indeed. To put it simply and in words that are perfectly understandable, this is what is called the lynch-mob mentality. Never mind that there might be mistakes being made (ask Timothy Evans and Derek Bentley about that one), hang the SOB regardless, we (the mob) believe him/her to be guilty, so there he/she must die. One day that mentality will turn around and bite the mob on its fat, self-satisfied, sanctimonious, self-righteous arse, and then where will we be...?