You want be a jerk to a cop. Well that's your problem. When they walk to a car they don't know if you are friendly or are going to shot as soon as you get to the car. As much as you know you aren't doing anything wrong... they don't.
Look people use the same thing we do for that other stuff. It is illegal. (not going to get into whether it should be or not) Even if it was you aren't allowed to drink a brew while driving and I doubt you will the other stuff.
IF YOU ARE STOPPED IN YOUR CAR
Stop the car in a safe place as quickly as possible. Turn off the car, turn on the internal light, open the window part way and place your hands on the wheel.
Upon request, show police your driver's license, registration and proof of
insurance.
If an officer or immigration agent asks to look inside your car, you can refuse to consent to the search. But if police believe your car contains evidence of a crime, your car can be searched without your consent.
Both drivers and passengers have the right to remain silent. If you are a passenger, you can ask if you are free to leave. If the officer says yes, sit silently or calmly leave. Even if the officer says no, you have the right to remain silent.
"But if police believe your car contains evidence of a crime, your car can be searched without your consent." Just so it isn't glossed over.
"IF YOU FEEL YOUR RIGHTS HAVE BEEN VIOLATED
Remember: police misconduct cannot be challenged on the street. Don't physically resist officers or threaten to file a complaint.
Write down everything you remember, including officers' badge and patrol car numbers, which agency the officers were from, and any other details. Get contact information for witnesses. If you are injured, take photographs of your injuries (but seek medical attention first).
File a written complaint with the agency's internal affairs division or civilian complaint board. In most cases, you can file a complaint anonymously if you wish. "