I've been once or twice to places like India and I have a fear about leaving. The fear is that I will place my suitcase for hold luggage on the belt and a little bit later my name will be called over the PA to go to the airport manager's office. There they will show me my suitcase with bags of white powder inside it and accuse me of drug smuggling. By that evening I will be in a hellish, roasting hell of a prison which stinks of excrement, surrounded by crazies and gang members, and forced to sleep with 20 others in a tiny cell. And that that will last for months and then years as the wheels of justice grind very very slowly.
Why should such drugs end up in my luggage? In Japan some customs guys once did this as a "readiness test". But they failed to tell security. But equally, supposing some network of smugglers infiltrating airside put drugs in the wrong suitcase... or planned to pinch my suitcase somehow at the arrival airport before it came on to the carousel?
Presumably this doesn't happen very often, or we'd know about it. But the anxiety actually ruins the last week or more of such trips to such countries for me!
Last time I left India I took only cabin luggage on the return flight... and the check-in staff were unhappy, saying that I could be fined (!) for having no hold luggage, the theory apparently being that if you have a suitcase this is proof you have bought some worthless trinkets in India, thereby helping their economy.