I'm with Ruralninja - if you already know your tolerance to alcohol and enjoy wine or beer then you make whatever decision you want.
A glass a day is too much for what Heidihole? I only say that as devils advocate. If I have a glass of wine a day which I manage to stretch out from 6pm when I get home until 9pm when I go to bed, drinking water, eating food and generally being sensible then how is it too much? And does it automatically mean that my baby will be affected to the negative? No, not really. Guidelines are just that. Guidelines. Just like women make whatever decision they want to about eating pate, cheese, ham, runny eggs and the like, they can make a decision about alcohol.
Those of us that do drink regularly during our pregnancies aren't telling others others to drink, just as my pregnant friends who don't drink during pregnancy don't tell others they shouldn't.
There are so many things that pit women against each other, during our pregnancies, once our babies are born and how we bring our children up and this is just another one of those things - I for one, don't think that Chocolatemolehill is being preachy or a bore and completely respect anyone's personal decision to do whatever they want with their bodies during pregnancy just as she has said that she's not judging anyone for wanting to drink.
I think, however, that the implication (not that the implication is here on this thread) that a woman who drinks during pregnancy must have an alcohol problem and is so totally selfish that she can't abstain for 9 months is one that gets bandied around whenever this discussion arises and this is the reason that it gets heated and why everyone's hackles are automatically raised.
We're all educated, smart women and we can all make a decision for ourselves based on our own risk assessment. Some may choose to drink alcohol, others may not. I have no time anyone who judges others on their personal decision.