What, pray tell, will the police do with the Pediprimate denying all knowledge of your existence? It's your word against his; and if he has a friend, you don't have a leg to pedal on.

Now, taking down his license plate number and reporting him as a gross polluter may have its advantages...at least in California. Costs the state nothing, you nothing, and the moron about $50 and an hours' time to get his car re-smogged.