Ground effects were not banned due to a scary habit of trying to kill people. Some race series' outlawed ground effects due to the additional risk of a major incident caused by significantly increased cornering speeds - not the same thing at all.i know ground effect was banned from competition due to it's scary habit of trying to kill people, but is it outright banned at the track level?
ie even if it was a one-off publicity stunt you couldn't use it.
They are not banned at track level, or in all forms of motorsport.