The point wasn't about the ubiquity of the feature set in cars but rather the cost of bricking one/crashing one being well beyond what it is for a quadcopter. A

The point wasn't about the ubiquity of the feature set in cars but rather the cost of bricking one/crashing one being well beyond what it is for a quadcopter. And the point still stands. The people who are out there with quadcopters are the same people who would be doing these hacks at home on cars; some hobbyist/tinkerer subset of nerd. I don't share your low opinion of their threat evaluation functions either.