Yes, HBG especially as they get large are very effective predators on FHM. Far less effective predators on GSH though. As far as "everyone" on the forum saying to stock them, I've not seen that. I see them being recommended under certain circumstances and goals. Generally that is in a HBG\HSB\CC stocking combo where supplemental feed is fed or with LMB where the goal is to grow large sunfish, not bass...