When do we call it a "who"? Where is the line? Sometimes I don't go down an aisle if I see the spill monitoring robot in my local grocery store. I think it's a

When do we call it a "who"? Where is the line? Sometimes I don't go down an aisle if I see the spill monitoring robot in my local grocery store. I think it's annoying, slow, dimwitted, and I can't communicate with it. Sometimes as a joke I'll even stare it in the camera and say "Your mother was a toaster!" Where is the line where I'm no longer just a crazy person, but also a racist?