Actually, unless you are doing it voluntarily, answering a Police Officers questions without having your attorney present, or having been informed of your rights under the 5th Amendment does violate your rights under U.S. law. In U.S. Society, your rights do not get 'checked' at the front door just because you are in public. And as far as the law is concerned, violating your 5th Amendment rights is the same as going through your pockets without a warrant, or pursuant to an arrest.
Have they just completely dispensed with teaching Civics in schools anymore????? This is all stuff I learned in 7th grade.