Meanwhile on another galaxy, Dyson spheres and ringworlds have already been constructed lol. IMO even if we've been been or under watch of some alien race - i don't think they'll show themselves until when the time comes. I used to play some space colonization game and it seems like it's the only logical thing that an advanced lifeform would do. But maybe not as well, it's not like we really care about ants - the same could be true for humans in relation to some advanced alien race.