My dad always tells that joke about my older brother who ran a stop sign (which is now a yield sign) a block away from his house and got a ticket.
About the license and registration not being asked in Texas, I got stopped in Louisiana (and searched for drugs) and the guy asked for my registration.
While we're on the subject of stop signs, when my brother lived in South Carolina, a cop stopped him and said he didn't come to a complete stop at the stop sign. The cop said "all four wheels must be at a complete stop." True story.