Originally Posted by DArtagnan 
I'd be ecstatic to learn we're not alone - and I'm more than willing to risk contact.
While I love the idea that we are not alone, I'd much prefer that question remain unanswered until we are advanced enough to defends ourselves from an extra-terrestrial threat. If we did find proof of other civilizations, they likely will be much more advanced than us, and in our history, the less advanced civilization almost always gets treated pretty badly.