Knowing that we are historically a violent race do you really think they would approach us with open hearts and hands wanting to be our "friends"? They'd be armed locked and loaded for bear so to speak with weapons beyond our imagination. They might well employ mind control/hypnotism/brainwashing only on a scale so advanced even the most creative among us could not imagine it. So that's what's in store just in case we become a place for aliens to explore more (than they allegedly already have). We have had centuries to cast our bread upon the waters and we will reap what we have sown. (I know..mixed metaphor..I like it)