english: Maybe it is, but wouldn't aliens engage in some recognizable activity -- put worldlets around a star to capture free sunlight, collaborate on a Wikipedia Galactica, or just shout out to the universe, "We're here"?
non_english: Možda jeste, zar se ne bi vanzemaljci bavili nekom prepoznatljivom aktivnošću - stavljanjem malih svetova oko zvezde da uhvate slobodnu sunčevu svetlost, sarađivanjem na Vikipediji Galaktika, ili prosto da viknu svima: "Ovde smo"?