Hey I love this post... Anyone that has traveled extensively and especially across land borders has experienced some sort of horror show put on by immigration officials. On the other hand I've had some great ones as well. I think the funniest one for me is when they've tried to say I overstayed my visa when I know its a scam. Happened to me in Cambodia and India. I always carry around a small notepad and pen and would ask them their name and write it down very carefully. Then I would ask for their supervisors name and write that down if given. In India I sat down and ordered tea asking the officer about his family and life story haha. Interesting about Vietnam. I crossed from Cambodia at Ha Tien and besides them trying to squeeze a dollar from me had a normal stamp and on my way... No worries. I live in Thailand and let's just you can imagine the story sometimes at the border. Just have to keep smiling. Oh yes and I was denied entry to Canada. Forgot about that one hehe. They started searching my car and reading my diary and interrogated me. And yes I've been harassed at USA immigration and I'm from there. Well over all normally its no problem if you consider percentages...