Are we not already?

Theoretical physicist and stater-of-the-obvious Stephen Hawking recently informed the people of Earth that they should be afraid of aliens.

Viz:

World renowned scientist Stephen Hawking believes extraterrestrial life almost certainly exists -- and humans should be extremely cautious about interacting with it.

He suggests that aliens might simply raid Earth for its resources and then move on:

"We only have to look at ourselves to see how intelligent life might develop into something we wouldn't want to meet. I imagine they might exist in massive ships, having used up all the resources from their home planet. Such advanced aliens would perhaps become nomads, looking to conquer and colonise whatever planets they can reach."

He concludes that trying to make contact with alien races is "a little too risky". He said: "If aliens ever visit us, I think the outcome would be much as when Christopher Columbus first landed in America, which didn't turn out very well for the Native Americans."

(courtesy Huffington Post)

I mean, how many movies do we have to make/watch about this exact hypothetical situation before scientists understand that we get it?

I wish Stephen Hawking and his ilk would stop being so theoretical/theatrical and spend their time on more constructive endeavors, like inventing an alien-slaughtering death ray.

In other news, you should be afraid of snakes--very afraid:

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