In the future, I will not participate in regattas where non spin boats are on the same course with spin boats.
I'm really sorry to hear that and I hope you'll reconsider. I enjoy sailing both one-design and in mixed fleets and have no problem sharing a racecourse with disparate boats (even mixing mono and multihulls). The water belongs equally to us all.
I think if boats refuse to sail together, we'll simply divide up our fleets until none of them are big enough to continue. Then there'll be no racing at all. Sailing is not a large enough sport (at least anywhere I've gone) to be exclusionary.
Sincerely,
Eric