I'd like to see a comprehensive breakdown of exactly what you should do in real situations when approached by cops.
I just read a very helpful book about that, Arrest-Proof Yourself: An Ex-Cop Reveals How Easy It Is for Anyone to Get Arrested, How Even a Single Arrest Could Ruin Your Life, and What to Do If the Police Get in Your Face by R. Dale Carson,
http://www.amazon.com/Arrest-Proof-Yourself-Ex-Cop-Reveals-A...
which was recommended in another thread by another HN participant. Hat tip to him. The book is very interesting and practical. (I am a lawyer and used to be a judicial clerk, but I learned new facts from the book.)