Hm well I guess it has to be managed... The most "bullshit" happens I guess is in ranking because this table is not autosorting itself. Ppl need to copypaste existing stuff and place their own times in between and I think that could maybe mess up the table. Maybe make another sheet where people simply write down their race setup and times, and you take this times and place em into the already existing sheet while keeping this sheet locked for yourself.

This way your current document will stay clean. But well, it has to be managed...