If it's for sport, they should not be road legal and only allowed on race tracks. As a cyclist in the Bay Area, nothing is more annoying that all the sports car owners speeding up to and on skyline during the weekends.
I'd be sad if all public roads went that direction, but I think I'd like the peace and safety that could come with prohibiting anything like "spirited driving" on public roads in densely populated areas.
So your "in the sticks, on a twisty road outside the city" -> closed track for that purpose.
I legitimately can't figure out whether it's the left or the right that is more authoritarian. Both sides really love the idea, it seems, just on different topics. I hope the great big center reasserts sanity sometime soon.