depends on the time that they show that they hermie. if its at the very end of the grow, i would leave them. if its at the begining of the grow i would chop the plants.
in the middle its hard to say, depends on what else i have going and the time left on the hermie plant. the seeds they make are useless, so if its at a point were most of the bud will be seeded or if it will pollenate other plants i would chop it. if it looks to be fire smoke, and only a few seeds will be created id let it go.