[sand500]

could just surround a car with 4 people. What is it going to do, run someone over?

[Eridrus]

This applies equally well to people driven cars.

[SomeStupidPoint]

People are willing to hit people with their vehicle to escape an attack.

It's doubtful we'll let self-driving cars make that choice (and in fact, would likely be illegal under current laws which prohibit weapons from being automated).

[tyingq]

4 mannequins would be funnier.