Thousands of people have stood behind a jet during take off. I maintain that it's no more dangerous than sky diving or mountain climbing. Just because you wouldn't do it doesn't change that fact. Have you ever done it? It's a tourist attraction for a reason. Think about mountain climbing, A person is thousands of feet in the air held up by a single rope that attached to a piece of metal that wedged into a rock. Why don't you think that's a stupid sport? As far as danger goes, I'll take a jet blast ( on terra firma) over the previously described mountain climber any day.