I don't think there are set rules, I just think that there are so many wise moms on the pink board it is probably a richer place for a response of this type.
I am open to all types of posts, and warnings do help.
I think everyone means well, and no one actually intends any harm to anyone. I have learned so much about being sensitive to others feelings going through this process! But learning usually does not come without a teensy bit of pain.