I use to have to commute about 20 minutes out of town to get to my job in another city. That's a very interesting story. It sounds like that cop didn't have a clue what he was doing. I don't think it has been thought necessary to ban heart attacks, strokes, etc. The issue is whether or not all potential causes of accidents must be enumerated in the highway code.
Murder is also an instinctive reaction also.
No it isn't. This is not covered by the highway code and does not apear to be covered in law. You haven't given me sufficient reason to care about this alleged problem. Just because it may be rare does not mean it is not life threatening to innocent bystanders. I suspect that the vast majority of drivers would rather be somewhere more comfortable than the motorway when they get their rocks off.