Yeah, I agree.
If the cops pull you over, you are in police custody. You are not free to leave.
And you should have a 5th Amendment right.
There are different circumstances involving a road side chat with a cop that can be quite different. For example, 2 different questions an officer may ask you:
1. Hey! Which way did that guy go?
2. Hey! What are you doing leaning over that dead body?
3. Hey! Is that marijuana in your pants?
In #1, it is almost your civic duty to answer the officer, but you do not have to as it is your Constitutional Right to just sit there and stare dumbly. If he pushes the issue, just remain calm and friendly and repeat that you decline to respond at this time. “I ain’t seen nuthin,’” is also a typical response that I get that usually gets me walking on.
In #2, you should slowly show your hands and request a lawyer.
In #3, you simply respond, “These aren’t my pants.” You’ll get arrested, but you can go to Court confident that you admitted to nothing.
Pretty simple really.
The majority of the law enforcement and judges are worse than the other criminals they posecute.