Since we're sharing border crossing stories, I had one particularly notable trip to Europe several years ago. It was shortly after the Euro zone was implemented and several years after the break up of the Blakan states
On the same trip
1. We accidentally drove into Germany. We were sort of lost, but not panicking yet, when we passed a huge "Welcome to Austria" sign. Since we thought we were IN Austria already, that's when we started to panic. Finally figured out where we were and realized we'd spent the last half hour or so in Germany. So I definitely have an inherent instinct to be sympathetic to someone who accidentally ends up in a different country!
2. Same trip, a week later, we were intentionally crossing between Hungary and Slovenia. Like I said, it was after the break up of the Blakans, but Slovenia was still very much in recovery. So the border crossing looked straight out of a Soviet propoganda film or something. And we spoke neither Hungarian nor Slovenian and google translate wasn't really a thing. And... to make matters worse... my passport had an endorsement for my married name in the back, but the front page still had my maiden name. So some crusty old agents took our passports and walked to the worn down shack. It had glass windows, so we could see, but not hear anything. One agent starts inspecting the passports then calls over 2 others. 10 minutes or so later, they direct us to pull over to the side. 2 more agents appear. At this point we're envisioning headlines of "two American tourists disappear mysteriously in Eastern Europe." My new-ish DH starts wondering if we need to bribe them or develop some sort of escape plan. Then two of them come over, all smiles and laughing, and point to my engagement ring and my two different names in the passport, and send us on our way with lots of smiles and waves. We went from mild terror to bemusement really fast! (And, for the record, Slovenia is an amazing country and people should go visit it!!!)
All of this has not much to do with the topic at hand, but since people were sharing anecdotes, I figured I'd share mine