Disinformation. Gummint gives this guy a few bucks to spout his bullshit. It helps to convince the people that those super secret spy planes are really just flying saucers flown by aliens.
There was also an interesting segment on Larry King Live that had some ex military workers talking about aliens disabling and scoping out nuclear sites around the world. http://www.nhne.org/news/NewsArticl...eType/ArticleView/articleId/4790/Default.aspx Seems like they are trying to help us not destroy ourselves more than anything else. As the astronaut says in the piece, they have technology so much more advanced than we do that if they wanted us gone it would probably have already happened. We humans are intent on being so arrogant that we are the only "advanced' intelligent life in the universe yet from an outsider's perspective I doubt they would agree that we are really that advanced at all.