Given the numbers of phones Samsung is selling the per device fine isn't that high. Compared to copyright infringement statutory damages in files sharing cases the amounts are tiny.
Edit to add:
Some fair points were made in replies about the complexity of the patent law compared with criminal/murder cases but the parent to this was commenting the scale of the damages decided rather than complexity and that was the focus of my comment.
Yes it is scary but I'm not sure I can think of less scary options for really serious criminal cases.