It is true. There are an incredible amount of deaths a year on the Nurburgring, enough to flag it as dangerous enough to be shut down, however almost all deaths that happen on-track are only declared in-hopital after the victim has been cleared off-track. This classifies the death differently and clears the track's grim record. I'm guessing controlling what media makes it out of the track will minimize the chances of anyone doing something about the loophhole.