Yeah, that's what the Canadian customs officer thought when I was pulled into secondary too. He was absolutely convinced there was no way a country would be so harsh as to blacklist you for 5 years just for an overstay, and there must be more to it. Tried explaining to him that it's a military dictatorship who seemingly refuses to hold elections, and the general seems quite xenophobic, but he wasn't buying it.
Well, whatever. Sorry, I'm blind, so I don't really get to have secrets anymore in life.