I could see plenty of "I thought he had a gun" scenarios, we're just chopping off the "...and felt threatened" part. Unless the robot accompanies a group of humans and decides they are threatened by the situation. It becomes "I thought he had a gun and decided the humans with me or around me were threatened". Maybe these robots could be outfitted to coat a person in immobilizing goo or something rather than filling them full of holes. Or long range tasers. Or tranq darts.