And already we have all sorts of problems with cruise missiles (fired by mistake, locking on the wrong target, misbehaving in flight...). Increasing the window of risk to ground combat is very, very risky. As the British ex-soldier quoted in TFA, even humans struggle to discern friend from foe in situations like Afghanistan or Iraq, a machine could potentially create clusterfucks of unimaginable proportions.

Not that I think someone won’t do it - if it gives even a resemblance of tactical superiority, someone will deploy it, then watch in horror as things go terribly wrong.