Surimi is right, warfare has already been automated like this for half a century.
http://www.militaryfactory.com/smallarms/detail.asp?smallarms_id=30
And while the star trek version of colonization is pure fantasy with our current understanding of technology, I do think that life is too valuable to only happen here. Seed the galaxy, send out a bunch of tubes of slime or Tardigrades or whatever towards a couple million stars and hope for the best.
http://www.militaryfactory.com/smallarms/detail.asp?smallarms_id=30
And while the star trek version of colonization is pure fantasy with our current understanding of technology, I do think that life is too valuable to only happen here. Seed the galaxy, send out a bunch of tubes of slime or Tardigrades or whatever towards a couple million stars and hope for the best.