can you imagine what humans would do to other creatures and their resources who we found to be weaker?
I'm hoping for some seafood from Europa before I die.
For real though, the signal points out to one huge teaser that will leave all space-geeks and finger-crossing alien hunters with perma-blue balls... distance. Even if we capture a new signal and figure out a way to decipher it, the civilization that sent it probably doesn't even exist, or at least they won't be the same civilization they were when the message was sent (thousands or millions of years ago depending on what we happen to catch on our radar).
As far as Hawkins' deal about superior beings coming down to rape us, it's a 50/50 chance. I think he's projecting human characteristics onto something that will be far from human. There's just as good a chance that they could be benevolent or boring. If they're a product of biological evolution as we know it, the "survival of the fittest" mechanism doesn't mean they all have to be assholes (the basis for thinking that smart aliens would conquer us).
If they're smart enough to tackle interstellar travel and do things with physics that we can only imagine, they probably care as much about our existence as we care about an ant hill in a random country that we don't live in.
I do think we deserve some answers about those cows they mutilated though. Who mutilates a cow right there in the pasture? That's like kicking a baby.