I don't think most self-respecting lawyers will do a JD if they already have an LLB, they'll probably do an LLM. If someone does take a JD to whitewash their LLB, that probably means they are quite ashamed (or feel that their degree is useless). Why bother being frightened? In any other ordinary situation, an LLB in another jurisdiction would have taken an LLM, suggesting either poor planning or a poor degree.