I loved participating in the seed swap last year, it was a blast, but this year I won't have the variety of seeds to swap as most of what I have is either dying or in complete dormancy. (Flower production shuts down as the plant struggles to survive so I really have very few flowers to collect seeds from.)
My real concern is whether seeds collected from stressed out plants will somehow be stunted. I would really hesitate sending my seeds to the swap if I thought there was an overwhelming chance the seeds wouldn't be successful.
I love growing from seed, and I realize that it is always a bit of a gamble, but I would hate to send seeds that would be doomed to fail. :-(