You cannot stop it totally but you can do something that can made him share to you why he do such foolish things.. I have a brother and he really gave me a lot of headaches.. but I'm trying to be calm as ever to show him that I don't need a fight from him..*sometimes I yelled that I almost wanted to give him a hard pinch on the face* what I need is for me to understand him why he become like that.. sometimes there are cruel things or pain  that happened to a certain person and they didn't know how to express it, sometimes they are scared to tell it.. what they need is space.. a total understanding that even he still made you really mad.. he knows that you were there for him.. and time will come he will become fed up of the fight and he will realize one day that I must move on and change for the better.. that was what exactly what happen to my brother and I was really happy for him.. hope he really changed for good...