Do you believe in UFO's?

Saucers manned by green men? No, why would they bother on this primitive planet..
People seeing fat ducks flying and mistaking them for green men in frisbees? Quite possible.
Alien life-forms on other planets far far away, with biology, tecnology and society from completely different structure to close to ours? Very likely, we're here after all.
Loonies wanting to believe? That's humanity for you.

Jam it back in, in the dark.

Originally Posted by Aardork

you think that anything below godlike immortality and faster-than-light travel is primitive.

Well, for one, humanity is still quite young. We've made so much technological advancing that evolution can't keep up. You would think our distant "cousins" have had their time to build up their smarts, while and before setting out.
No, you don't have to be god-like to be advanced, but faster-than-light travel sure could come in handy, unless you want to spend forever traveling from star A to star B.

So, either grey/green/bug faced freaks like to conquer new holiday planet, which really isn't that hard for someone managing to get here
or
they go with the Star Trek style, "you don't go messing primitive races society suddenly".

My point, since we've had no visitors yet, they either aren't there, they're not interested or maybe they study us behind Mars by watching Oprah..

There's nowhere I can't reach.