That's a really nice article. I don't typically read security exploit posts but it was pretty interesting.
In the section about possible attacks, it wasn't clear if those three options represented the worst things you could do or just possible ideas. It seemed to me that locking the throttle to maximum would be worse.
Killswitch is still physical, so I guess unless that's in the bad conditions and, say, in a curve..... But yeah, killing bad.