No, some states have had border checks for things like animals and produce/fruit (to prevent the spread of some diseases), among other things, for many decades. The California border is the one I’ve run into most often. They don’t always ask for ID, I misstated that, but there is a stop and they can scan license plates and look for suspicious activity.
Hehe, maybe review some of the huge swath of border checkpoint refusal videos on YouTube before making such an assumption. Some people get away with it, and some do not. Refusing to show ID might be justification for detainment or arrest.
Also, pro tip: when crossing the CA border, if they do ask for ID or ask for you to get out of your car, make sure to buckle your seat belt before you drive. The cops waiting there will pull you over for buckling 3 seconds after you start moving, I learned first hand.
Edit to add a few informative links, as I’m googling them, with some details that are new to me…
