Eveyone is going at 10/10ths and that's fair enough, after all it's a race track. Unfortunately everyone thinks they're a racing driver and very few people doing trackdays have any kind of driving ability, with the majority most certainly having the ability to kill or be killed.
Unless you make it a rule that everyone doing a trackday has to have some sort of prior training like an ARDS test or something like that it's not going to improve the standard of trackday driving, and i bet the amount of trackday business being done would soon suffer if those kinds of rules came in.
The sad thing is though that even if you did the training and pass a test it doesn't stop you from being a bloody idiot, so im my opinion the only way forward is to change peoples attitudes.
Perhaps a graphic video of people having bad trackday experiences and the results thereafter being shown in addition to the driver briefing just prior to getting on track might be one idea.
I wish everyone safe trackdays wherever you go
