getting out and fighting someone after they cut you off would not be a good example for your child. I have a family too, but one kids stupity dosen't call for another mans encore.
I know when my son turns 16 I don't want him retaliating to someone cutting him off because he saw daddy do it. Everyone has their own parenting style, that is mine.
I feel you on being upset, I am just a liad back person and don't get to worked up while driving.