Jack - US Sailing forbids the types of waivers you posted. Rule 82 (a US Sailing prescription) does not allow Hold Harmless or Indemnification agreements as a condition of entry.
Matt,
I see that you are correct as usual. I am curious, however, as to why?
I agree about the "speed bump" reference, but it does provide perceived protection, at the very least. It is intereseting that different sports have different methods to protect officials and participants.