Are We Alone in the Universe? By Brian Simpson

     For your interest; the possibility of vast alien megastructures blocking the light from the star KIC 8462852:
  https://arxiv.org/abs/1509.03622
  https://www.youtube.com/watch?v=gypAjPp6eps 
  https://academic.oup.com/mnras/article/457/4/3988/2589003

     If this is evidence of advanced alien life, then they must have solved the problem of how not to destroy themselves. Perhaps they channel their aggression into destroying other civilisations as in this forthcoming movie representation, Predator (2018):

     Oops, this clip is far too violent for me.