In my state they ended up passing a distracted driving law that includes eating while driving. It’s a secondary enforcement law (they can’t pull you over for it).
If you run a red light while eating a hamburger, you’ll get the primary fine (running the red light) plus another $100 fine for distracted driving.
Why? because for some people taking a drink or a bite of a burger will make them crash. This is especially true in urban areas with a ton of things a driver needs to be aware of and react to.
If I recall correctly they linked a bunch of powermacs together with FireWire.