I live here in the AZ and all I have to say is follow the laws and you have nothing to worry about. Serge would have never been pulled over "for no reason", especially if he was driving a "nice car" in the Dale or something (Scottsdale for visitors) . Heck the windows on his "nice car" were likely tinted (as most Arizona cars are) anyways so race or skin color likely had nothing to do with it. What really sucks is that a few really bad apples messed it up for the rest of the cart.
Like it or not the laws are what they are, follow them or deal with the consequences.