Cops play hunches / percentages , If it walks like a duck, and quacks like a duck , You are A duck. Rule number one Don't smoke in your car , I bet stats would show more pot busts for use, and possesion, is by traffic stops . Aroma of weed , pipes, roaches, papers, Alittle baggy on your person , in the glove box, in the console . If most people would smoke in the privacy of there own home , instead of out in the public , Cars And yes cars are considered out in public. etc, You would hear of alot less arrests .