(You also start to have a bylaws problem when the established classes do not include Hobie built boats. In my opinion this is not a problem with F18's and Waves)
Easy fix. Check a box for the boat(s) you own, you can only vote for changes that are either pertinent to your class, or the association as a whole. If you're a member, and crew, tough titty, you don't to get to vote on a class unless you are at least a partial owner.
F16. It's just a matter of time until Hobie licenses an existing builder.
I don't think so. HC US thinks it'd be competition for the H16 which other than they both float they don't have much in common. He's probably right when it comes to the general public buying a catamaran though.