Comment They're already here (Score 1) 36
Seriously - with components anyone can buy and software anyone can obtain, I could build multiple types of killer robot in my garage.
Then again, I can also make all sorts of other very dangerous things. And I could drive my car down the boardwalk on a sunny day and probably kill dozens easily, hundreds with a bit of effort.
You mostly don't have to worry about that because typically we're not trying to kill each other, and the occasional unhinged person who is tends to either give a lot of warning or muck up the job.