I don't find this creepy at all! I love learning about emergent behavior in animals and when those principles are applied in computer science! Give me more.
50/50 cool / creepy for me. Robots learning things like European football or search and rescue missions is very cool. Battle drones doing Black Mirror stuff....not so much.
Like any technology, this can be used for good or evil. Considering the track record of billionaire tech bros, I'm concerned.
Ooh I did a project based on this in Uni. It's surprisingly easy to build a kill bot even without a processing unit. In fact the real issue is getting it to not kill everything that moves.