I think they are keeping to themselves because they knew that if we learned of their presence it would be a really big deal, and it would disrupt the next season of American Idol and it is not worth it to them.

Anyone hear that story of the flying disc over O'hare airport.
I saw some clips of a guy who gives lectures with other people from various professions such as the airforce, nasa, and so on where they say that we have made contact and that they are trying to get the government to disclose all that they know. It is called the Disclosure project and they even say that we have communicated with them. They say that they are peaceful. It is wishful thinking IMO, but it would be really cool.d

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Neither am I the means to any end others may wish to accomplish. I am not a tool for their use. I am not a servant of their needs. I am not a bandage for their wounds. I am not a sacrifice on their altars. ... I owe nothing to my brothers, nor do I gather debts from them. I ask no one to live for me, nor do I live for others. I covet no mans soul, nor is my soul theirs to covet.

Ayn Rand, Anthem.