Except that they aren't wearing any sort of eyepro or face protection, if they're doing force on force with sim rounds like that they're stupid, and even if they're just rolling in to shoot paper targets ricochets can come back at you in a hurry. Those sim rounds hurt like crazy because it's still a metal projectile, and it's still being fired out of a gun (admittedly, by the force of the primer alone, no gunpowder) it would have no problem taking out an eye, a tooth, or an earlobe. Where did you find this picture? Perhaps it's a dry run before they do it with simunitions?