I think the scoring is kinda a background thing, but it would still not be super easy. As for shrugging off, that's why there's the immunity and super-effective sections. If that keeps happening, I test it later using the super-effective method. If (s)he shrugs it off, then I PM the player. If it doesn't stop (3 full warnings via PM, and probably at least one in the OOC publicly), that character gets killed off by some creative insanity suicide/homicide from someone else.