here's what i came up with: if that boy is being mean to sissy or to someone else smaller, you can tell him to stop. but if he's just being mean to you, then walk away and don't play with him anymore.
once after the mean boy (that's what i've started calling him; i don't know his real name) had roughly pushed past betty and made her cry, jonas marched up to him with his hands on his hips and said "You, sir, STAY AWAY FROM MY SISTER!" i was so proud. but later, if the boy was hitting jonas, jonas hit right back, and i was less enthusiastic about that. i just told jonas to stop hitting and leave that boy alone and go play somewhere else. but jonas didn't get a spanking or anything, because i saw everything, and the other boy instigated every time. of course his parents are like 50 yards away eating lunch and talking on the phone, completely oblivious.
here's a funny story about theodore roosevelt:
what do you think? what would you have done?
Theodore taught Sunday School at Christ Church, but he was so muscular a Christian that the decorous vestrymen thought him an unwise guide in piety. For one day a boy came to class with a black eye which he had got in fighting a larger boy for pinching his sister. Theodore told him that he did perfectly right—that every boy ought to defend any girl from insult—and he gave him a dollar as a reward. The vestrymen decided that this was too flagrant approval of fisticuffs; so the young teacher soon found a welcome in the Sunday School of a different denomination.