I haven't actually done this but have read a lot about it and do plan attempting it. What Granny said was very true. A forced hermied plant will yield better quality pollen than just the weak plant that just went hermie for no apparent reason. The pollen from a plant that hermied for no apparent reason should not be used. You don't want to pass on already real weak genetics. That being said, you will get a higher percentage of females from a normal plant that was pollinated using pollen from a hermied plant but it is also possible you'll get another hermie from those seeds and you'd be weakening genetics overall. And that's why a lot of purist growers will just up and kill any hermied plant at first sign. Just be sure any seeds produced in this manner are labeled clearly and are for your use only not to be crossed with anything.