Wow, I think I must know a rare circle of people, because I've never heard anything near as outrageous as some of these! I had an OB, and she was fond of reminding me constantly and incessantly how important breastfeeding was for at least the first year, and before I left the hospital advised me not to offer the baby a bottle, saying "my first had trouble nursing because I gave her a bottle too soon. Don't listen to anyone who tells you your milk isn't enough." That's my kind of OB, I think.
But I have heard a few:
My MIL says that she only nursed DH for two days, because every time she was ready to breastfeed in the hospital, the nurses made her disinfect her entire chest and abdomen with rubbing alcohol, and put a paper sheet between DH and her, with a cutout for her breasts. After two days of that, she gave in and let them give him bottles. Ouch. And my mother was told, after I was born, that she couldn't nurse after a c-section, that she wouldn't make milk, and anyway, "your breasts are too small to nurse."
Mine are even smaller, and I had no shortage!!!!
But the real winner was from my cousin, who has had two elective c-sections: "You want to have a section, because then the baby's head won't look so squashed in the hospital photos. C-section babies are prettier."