That's all well and good but it will never happen, you're basically asking people to take unnecessary risks for your entertainment. It's not fair or right to ask another person to do that. There's no need to make a dangerous track just to discourage drivers from exceeding track limits. Just enforce the rules that are already there. That's all that needs to be done here, enforce the rules.
Racing is risk, if you don't want to take risk don't race.
There are ways to make tracks less forgiving without killing the driver.
This is just one way where regulation destroys something - good intensions and all.
You don't have to ask people to race, people will always race, they are attracted to the speed and the risk. It is the business of racing that wants to mitigate risk, it is a business thing not a race thing.
Even if you have half the grid die each year in F1, you'd have new guys lining up. What would be wring is business people earning billions on the back of those dead boys (and girls). But if you give the choice to those who want to race, they will still want to race.
...and again, not asking for Deathrace 2000, but tracks with risk are what make racing, not playtracks without risk.