Far too many smallish punks and smart mouths get away with what they do because of the "pick on someone your own size" syndrome. As someone who's been larger than the average bear his whole life, I can tell you many, many jackwagons I've known over the years have their full sets of teeth only because if I'd given them the a** kicking they so richly deserved, I'd have been seen as the bad guy.
Scouts Out! Cavalry Ho!