You couldn't live in those other countries or overstay your visa though. I mean you could, but it would've been illegal. In Morocco it was a common thing to do,

You couldn't live in those other countries or overstay your visa though. I mean you could, but it would've been illegal. In Morocco it was a common thing to do, overstay European visas. They were still marked as illegal, and ID checks were common, and deportation very much so too. You almost always would've gotten deported if caught in an ID check. So I'm not sure how that could be considered to be open borders.