Maybe Stephen Hawking has a point? (evil aliens)

This reminds me of Star Trek Voyager. All the aliens were either
hostile or like the Third Worlders on Earth; whining, self-
insufficient parasites with their hands out, demanding that Westerners
(Earthlings in Voyager) "owed" them something. In any case, before
man ventures into space in a big way (and the only way that will ever
happen is by building Project Orion) they should go heavily armed.

BBC:
Hawking warns over alien beings

Aliens almost certainly exist but humans should avoid making contact,
Professor Stephen Hawking has warned.

In a series for the Discovery Channel the renowned astrophysicist said
it was "perfectly rational" to assume intelligent life exists
elsewhere.

But he warned that aliens might simply raid Earth for resources, then
move on.

"If aliens visit us, the outcome would be much as when Columbus landed
in America, which didn't turn out well for the Native Americans," he
said.

Prof Hawking thinks that, rather than actively trying to communicate
with extra-terrestrials, humans should do everything possible to avoid
contact.

He explained: "We only have to look at ourselves to see how
intelligent life might develop into something we wouldn't want to
meet."