Perhaps moral is not quite the right word. Ethical? Civil? Whatever ... vigilantism by beating up bad people is illegal, and I was assuming this to be a line you were saying it is OK to cross in certain circumstances. Note too that I have said from the start I am somewhat ambivalent on this case myself (which clearly implies that I also think there is a line somewhere that becomes justifiable to cross). Simple example (and a less violent one) ... walking down a deserted street I see someone on the other side requiring medical assistance. I can offer first aid, but the street crossing is 50 yards down the road. Should I break the law and jaywalk to get there as quickly as possible? My answer: of course. Even though I am the only person I've ever known to actually get booked for the archaic offence of jaywalking - many years ago.