I really don't like these statements that so assuredly close out one possibility on some mysterious phenomenon through a fallacious argument. We don't know what these signals are. We don't know everything about the universe. How are we so sure what it is not?

I mean, it only took me 5 seconds to come up with some technically not impossible (though improbable) hypothesis. What if that is the signature of a worm hole drive kicking in? That would explain why it's everywhere.