You can never protect 100%. Unexpected will always happen and you can't plan for the unexpected.
How many of you have been lapping at DDT, TMP, Shannonville without a 5-pt. harness or roll bar?
People participate in sports that have risks and they accept those risks.
Why isn't everybody calling for Dodge to put roll bars in the pick-up trucks:
http://www.youtube.com/watch?v=hGTrnV18Mbo