Well IMO there is almost no way to organize people by class. I like Nesba's aproach for sure,but they are able to do that and thats great. STT days are also nice for riders because on a given day people can be faster or slower depending on many factors. This allows a normal "I" class rider to try "A" class if most the "I" class is slower than normal. There really is a fine line and we all have to adapt to each day and situation. If u really want to be seperated by skill level get out and freeking race. At mid ohio they try to combat bad rider placement by having mass mass track coaches out on the track to help watch riding styles. All orgs do things differently and they all want the days to be SAFE as possible. Nothing about our sport is safe due to even the best riders crash,but all the orgs can do is try. If u dont feel safe with a particular org dont go and it wont hurt anybodys feelings.