i don't think it needs reporting under he is a repeat offender or till a biff breaks out or he touches you car.alls the police do is tell you to take ya personalised plates off for a while so your looks like one of the crowd and tell ya to drive another car if possible.if he is a repeat offender get his plates and go to the cops.take a foto of him with ya fone when he is goin ape shit then yell out haha i got proof now ya bastard, jk's don't yell out just take them to the cops and say look this fella is harrasing me do something. :(