If you have started with a stable strain and have purposefully stressed the female enough to throw-out male pollen sacks, the pollen will make mostly female seeds. (90-95% female, or so) The ladies from femmed seeds I've produced have always been stable in succesive generations.

If the strain is unstable, and prone to throwing out male nanners (without you stressing her to do so) the hermie trait can/will continue through sucessive generations. Once a genetic hermie, always a hermie.

Lots of folks freak when the see a hermie in their garden. I don't blame them. I would also remove unforced hermies. But knowing how to force hermaphrodism is an extremely valuable tool to have in ones growroom arsenal.