That's not quite the best solution - it would just sort out slow drivers,many of them are no crashers,some even happen to be safer then some fast ones,because they are more careful because of lack of skill,when skilled ones feel themselves as very skilled and don't care too much about others. Of course the only really good solution is multiple non-competing admins at event,but since it's not quite possible,we can just keep up how it was and weed out dangerous people by time...