The only way for an interstellar life form in possession of a Faster Than Light propulsion system to communicate is by mowing some weeds. Real.
Yeah, they travel millions of miles to draw a giant cock in Farmer Ted's corn field. You know what, that would be what I'd do if I had the ability to travel through space.
It's bored alien teenagers stealing their parents spaceship at night and fucking with people on Earth. Kinda like young high school kids stealing their parents car and lawning the principal's front yard. Or so I've heard.