As someone who has been [arrested | note: it's complicated. None of my 'offenses' were ultimately criminal, and I have no record.] for hitchhiking multiple times (and hitchhiked over tens of thousands of miles before turning 20)– nobody cares. Argue all you want, but unless you're grossly mistreated (and that's by their definition, not yours) in custody, I doubt even the most local branch of the ACLU will give a damn about your claim. Do I think it's stupid? Of course. But it still doesn't fly everywhere, and wherever you go you have to be able to figure out the turf if you don't want a hefty fine or a night of 'lodging' or more. Obviously, it gets much worse if you're a minor– and good luck convincing anyone if you're emancipated.