Feel for them, but they've been so brainwashed you could bust through the lines with a 5-course meal for them and they'd still hack you to death.
Well, there are a few who manage to escape across the border to South Korea. Plus the Chinese farmers will sometimes raid across and steal North Korean women for brides as their population control methods have resulted in a major shortage of women. I read about this in a TIME article years ago, and imagine the situation has gotten even worse.