"Each man thought: one of the others is bound to say something soon, some protest and then I will murmur agreement, not actually say anything. I am not as stupid as that, but definitely murmur very firmly, so that the others will be in no doubt that I thoroughly disapprove, because at a time like this it behooves all decent men to nearly stand up and be almost heard. But no one said anything. The cowards, each man thought."
Terry Pratchett - Guards, Guards.