I think the rudest thing ever said to me was when we were expecting baby #4.
I was a member at our local Methodist Church, and one of the women there said to me upon hearing of my pregnancy, "I'm so sorry! Well, you know I won't suggest you have an abortion, but what are you going to do?"
I was floored, and hurt.
With baby number 5, someone from the same church worked as a cashier at our local grocery. As she was scanning my items, she kept looking at my stomach then my face, back and forth. I said, "Yes, we're having a baby."
Her reply was, "Why?" in a tone that all but said I was stupid.
It never ceases to amaze me how other people think it's their business, or that they have the right to comment, when people choose to procreate. Unless you were IN the bedroom during conception, it's NONE of your business.