That's gonna be great until someone hacks it and has it stab me to death in my sleep.
In a more Orwellian world. It can be used to assassinate dissidents or individuals who speak out against authoritarian regimes. It's just a tool in a box, but it's one that's simple, easy to use, and leaves no evidence.
For a “car crash” I agree.
But if my laundry folding robot stabs me to death in my sleep, I hope that at the very least it raises some eyebrows :^)