Just my two won, but currently North Korea is the only place on the planet that I refuse to visit for ethical reasons. The regime there is not merely brutal but murderous if not outright genocidal (see eg. here ), and the extremely tight chaperoning of visitors means that there's pretty much nothing you can do to improve the people's lot -- instead, every penny you spend gets plowed into the army and supporting the mad edifice of Kim-Il-Sungism.

Here's hoping they're next in line for their long-overdue revolution, I'll be on the first place in when the regime does collapse...