Newspaper vending machines are so weird. Anyone can pay for one paper and take all of them, and that clearly doesn't happen or else they'd have stopped doing it or changed the design. So why have a coin-activated lock at all? Why can't I put a dollar in a slot and get a paper? Surely the extra 25% from people willing to pay it (because who has exactly three quarters on them ever) will offset the occasional person who will take one without paying?