I agree with you bxncbx about the spectator mode. I just do not feel comfortable with the idea, but other than being a private person by nature (to a degree with being on the internet), I am not sure I have a good solid reason.
I was talking to my husband about the "second helping" idea and he wonders if it could be enabled later in a swap to give others a chance at the seed. Another thought: could a seed be marked ahead of time "Not available for second helpings" or something like that? I hope I am not repeating something said earlier.