Workplace ignorance

I'm very open about my story to everyone at work, and am available for questions at anytime.  Yesterday this conversation happened around me.  All parties are well aware of my son, and my support of him.  All parties were aware I could hear this conversation, but since I literally had tears in my eyes and sat in shock I just couldn't participate.  So I will share it here.  This makes me so angry.  So I work in a Neonatal Intensive Care unit and we have just passed Valentine's Day.  Someone had donated handmade VDay quilts for the babies.  One of the babies, "baby boy" had a pink blanket with hearts on it, covering his isolette.  One of the nurses commented that he was a BOY and shouldn't have a pink blanket.  Further sort of scolding the unknown person who placed it there.  The other gals had an all agreement this was an awful thing, but not bothered enough to get up to change it. One nurse said, "this kid is going to have gender identity issues", to which one of the other ones agreed "yes, yes he is".  Really, the ignorance goes so far as to think that an premature baby who has a pink blanket on his isolette can be somehow encouraged to be a GIRL.  This is one time, I wish I was better versed at the ability to come up with something intelligent to say.  But alas, I just get to complain later.  Big sigh!!