Extraterrestrials: *sends encrypted cosmic message with solutions to interstellar travel, unified field theory, and the meaning of existence*
Scientists: "OMG a radio blip! Let's write 47 papers speculating what it could be!"
Aliens watching our response: *facepalm of galactic proportions* "These humans are still arguing about whether we exist while we're literally waving at them from Alpha Centauri. Should we try interpretive dance next?"