The system hasn't actually been used yet, though semi-autonomous drone strikes have already happened in other actual military deployments.

And they will do this.

'Friendly fire', 'collateral damage' are accepted elements of warfare for military staff and their political masters.

The big worry is this whole idea that the systems turn their fire on you when you try to switch them off. Which is the whole Skynet scenario in a nutshell, and rather undermines the argument 'How can it be that dangerous? A computer it can't plug itself back in if you unplug it, can it?'.

You now have fifteen seconds to comply...