My point is, at some point, your would-be dictator will throw one too many tantrums, and a trading partner will decide to go with less problematic markets. And we'll be paying more for Honduran coffee (or whatever the staple is), and the people who we've alienated will find other markets, China and India for two, giving them a better supply/demand ratio (and cheaper coffee-or-whatever).
Holding your breath until you turn blue works until it doesn't, and when it fails, you find out how much goodwill you've burned through.