Erie driving after dark

S/o to the idiot who nearly rear ended me speeding from one red light to another. I dont understand why people drive like morons with others on the road I really fear for my family and friends on the road more than me because I stay fairly vigilant and defensive when driving but geez people need to be considerate of the others that are out and about. Oh and it was a ford explorer so I figured may be a cop but nope just a joe shmoe probably lacking car insurance and common sense.