GUEST Santa seems to have missed the point. Some years back there was an air show accident over a dense crowd in France and many people were killed. The classic case was when members of the Thunderbirds followed, one after another, into the side of a mountain. This is not without risks. It should not be permitted over densely populated areas. Imagine six of the Blue Angel's jets plowing into the Golden Gate Bridge or, more likely, the financial district or the Hilton Hotel. Do I make myself clear? Present practice is just plain irresponsible. And dangerous.