I don't think that's what he's getting at at all, he's talking hypothetically.
agreed, but "we should avoid them at all costs" kind of contradicts everything NASA and the UK are doing. just last week (or maybe 2 weeks ago) I saw an article in the NY Times about how the UK could have a sattellite researching dark matter in the far reaches of the universe in the next 10 years, if funding continues at the rate it's going.
by the time they( the aliens) found us it would be a little too late to "avoid them", hence Hawking's warning. I don't think he was getting at what I said specifically, but deep space exploration in general.
Not to mention that NASA has sent out spacecraft such as Voyager 1 that is now entering interstellar space....
really? that's crazy.... is that the actual name of it, Voyager 1? isn't that, like, Star Trek?