Marlo, I also do that ( -- ) because my keyboard doesn't have an emdash. I always hope that its meaning (a break or shift in the sentence) is understood.

I disagree, Sharm. Please re-read mshades' post. "Right/Wrong" can cover both "Correct/Incorrect" (which imply factual accuracy, error or mistake) and "Bad/Good" (which imply harm/benefit and sometimes CAN imply moral/ethical judgment -- i.e., "Homosexuality is bad", or "Stealing is wrong").