I am suggesting that this proposal will accomplish nothing. It has no utility in preventing reckless driving, because 100 MPH is already reckless in >99% of scenarios.
Your proposed limit would only ever be hit by two potential people:
* someone who has a legitimate off-highway purpose for that speed
* someone who is already operating their vehicle at 100mph on a public road and still has their foot down.
What reckless driving has been prevented? None. In fact, only legitimate users have been impacted.
At best, we're just trading edge cases for edge cases. If we discount off-highway uses as an irrelevant edge case, then we can also discount the edge case that someone driving at 130mph did a harm to society but at 100mph they would have been prevented from doing so.