You're right you can autoforward to at least 31 addresses. I created a distribution list from my E-mail program, cut and paste it into the forwarding address box...
I never would have thought the forwarding address could be an entire list.
The SPAM issue is a good one to bring up, although I'm certain it won't be an issue with my wife's family and running friends. We're not sending it to the entire world (it just seems that way), just to the people that she would forward the results to anyway.