If you don't think it's bad, why would you drink less if you were pregnant or nursing? Not trying to be a jerk. Just asking.
I think coffee is fine. Like anything, can it be over done? Absolutely. But, a cup or two a day is fine. However, because there is a link between miscarriage and over consumption of caffeine, I'd personally cut way back if I were pregnant as a precaution. Just like I wouldn't eat certain fish, I wouldn't drink alcohol, I wouldn't eat soft cheeses etc..... all things that are fine when not pregnant but, when pregnant need to be monitored.