Do you think Greys really exist?

It's true we have been visiting your planet for a long time. Thousands of years, in fact. It is also true that we have worked with several world governments in the past. However, we grew tired of the political games and have put a stop to our collaborative efforts. We don't even abduct people all that much any more, unless we're just plain bored. Besides, we don't really need to anymore, anyway. The hybrid children are all full grown now, and have infiltrated your society quite efficiently.