Yeah, that video is from work presented at HRI 2015, so this new work seems a clear successor.
I’m tickled by the concept of a robot being able to drop stink bombs, or electrify it’s outer layer in order to scare people off. But I don’t think society is ready for that to happen.
For the animals (porcupine, skunk, etc), there’s this concept of ‘Don’t blame the animal for being an animal’ - I.e - they can’t help themselves, so if you get quilled or sprayed, it’s your own fault. But since robots are designed systems, I don’t think there’s a corresponding ‘robots will be robots.’ Any negative interaction will be reflected back on the robot designer (“why did your robot spray my child?”)
Playing dead, or shutting off might be the best option. Although I think if we can get the robot to be expressive and empathetic enough, displaying fear might be helpful as well.