I’ve never had anything like this happen in South Africa however Zimbabwe and a drone are a cautionary tale. Spent more than a 1/2 day in a small windowless room, was taken into the basement of the airport, to the top floor offices, and even onto the roof. Wasn’t sure if they were trying to intimidate or what. Met with a couple of “Ministers and Director Generals” in the government and am now an “officially licensed” Drone Pilot by the Civil Aviation Authority of Zimbabwe and have a cool certificate/license
Zimbabwe also questioned the fact I had a brick and a half of .22LR (declared) and tried counting each shell. They apparently thought the number was too high. I think they gave-up 1/2 way through the 2nd box of 50 which they had to recount like 7 times, and decided to believe my math of 50rds x 16 boxes. Exiting with Zero Rounds was also interesting but showing several different pictures of actual piles of guinea fowl, ducks & geese, or other birds, seemed to satisfy the police officers about me “shooting everything”.
I also had a live round fall through a hole in my Bino harness and get stuck between a couple layers of fabric while transitioning flights in a middle eastern country. Issue here was it was in my carry-on. It also wasn’t picked up in the states going through TSA multiple times. It also was a round in a caliber gun I wasn’t traveling with and my well meaning father was trying to talk out of it and had to be reminded about not speaking to the police. When a squad worth of soldiers carrying AK’s march towards you the situation can get tense but if you let them do the talking and listen it’s possible to make your original flight and only spend the layover being questioned.
There are definitely items I wouldn’t try to bring into other countries, and there are some items like the drone which I wouldn’t think about. Small misc gun parts like
@Green Chile had I probably would’ve had in my checked bag of clothing separate from the ammo box and if questioned said they were spares or “souvenirs”.
It also happens in the US. Certain airports are more friendly to firearms. Print out the TSA policy. I’ve had several TSA Agents get pissed about not having TSA locks on my gun case or refusing to give them the key so they could “inspect” them without me present in a restricted area.