answer:I think some of them might want to, in an attempt to “prove” themselves to others, as if fighting somehow “levels the playing field” for them. But, I’ve seen shorter people treated like blind people, in that even a town bully will refrain from picking on someone demonstrably shorter than he is, because he just might find himself attacked by an entire crowd. I witnessed something similar to what I am describing, in a grocery store, once. This big dude was slapping around his son, and the size differential was just too great, so a couple of wranglers came over to the bully father, knocked him down, and began jumping up and down on his esophagus. I helped with that. I supplied the applause and cheering.