>with a pilots license, and does something stupid (i.e., not out of character) and instead of killing one or two people on the road, he/she/it kills dozens or more of people after crashing into any number of structures that can cause secondary explosions<
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Or some muzzie loading it up with explosives and flying it into a tall building or some white structure in WDC.
Oh wait...
I doubt they will be allowed to fly within 10 miles of city limits. And that limit will be enforced by having all controls be fly-by-wire and a traffic controller remotely taking control and ground you while cops meet you on the ground to confiscate your half million dollar rig. Plus the armed helicopter patrols constantly overhead that will shoot you down if the remote takeover fails.