I killed the first guy because I was angry, he killed that woman at cold blood in front of me and his brother could hear his yelling. I'm sorry for Clementine for seeing that.
I didn't kill the second brother but I beat him bad. After seeing that the generator breaks and zombies started to come in, I thought that being eaten alive it's the worst punishment a man could receive... and, of course, it's sweet irony so I left.
BTW, the first guy who Lee must chopped his leg off (or not) it's trapped in a St. John's trap and if you try to open it Lee says that the trap it's modified for not to being reopened. When Lee said that "motherf****" it's the nicest word I told who put those kind of traps over there.