Regarding the boom, the spin boats seem to keep the main reasonably taught on the downwinds, so wild boom swinging gybes are pretty rare. Nearly knocked my son out with the TheMightyHobie18 boom a few years ago though.

As for Peter Pans and forestays, your doing it all wrong. If you're going to stuff it, do it right. It has to be hard enough to send them 20ft in front of the boat like I did on the reach at Sarasota. Totally screwed up my trap and cunningham take-up bungies, but my son sure had fun . I still have a sore spot on my thigh where I slammed into the dagger.

I wear a helmet when I mountain bike, and like a seat belt in a car, I feel totally naked without it. I suppose if the right kind of helmet was developed (light, breathable, available brim (like a baseball cap), I suppose I could be talked into it.