Eventually, we will get this one little radio message from beyond our world...and then...our entire vision of the universe will change overnight, and likely scare us to death.
Actually, most civilizations that are just a bit more advanced than ours have probably gone dark from our perspective, because radio waves are a fairly primitive technology to makre use of.
Maybe. On the other hand we might just get a warhead and a big flash. I figure there’s no reason to assume an ET civilization would have any particular regard for us. Lots of resources on Earth.