hmmm.. well if every single plant hermied out, I'd let them grow out.. I mean you have already put in months of time into the grow.. you just have to remember there can be leftover pollen and it could effect your next grow if you use the same space. So your going to have to clean it out good as fuck.. You honestly could end up with a lot of seeds though since you still have a while to go. You could always grow em out and make hashish out of them.. Or sample the buds and if they aren't that bad just smoke um.